首页 > 代码库 > 拍照、本地图片工具类（兼容至Android7.0）
拍照、本地图片工具类（兼容至Android7.0）
拍照、本地图片工具类：解决了4.4以上剪裁会提示“找不到文件”和6.0动态授予权限，及7.0报FileUriExposedException异常问题。
package com.hb.weex.util;
import android.Manifest;
import android.app.Activity;
import android.app.Dialog;
import android.content.ClipData;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v4.app.FragmentActivity;
import android.support.v4.content.FileProvider;
import android.view.View;
import android.widget.Button;
import com.hb.common.android.util.Log;
import com.hb.weex.R;
import com.hb.weex.util.ToastUtil;
import com.hb.weex.util.UploadAvatarUtil;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import kr.co.namee.permissiongen.GrantPermissionActivity;
import kr.co.namee.permissiongen.PermissionGen;
import kr.co.namee.permissiongen.internal.Utils;
/**
* 拍照管理的类
* Created by cjy on 2017/4/03.
*/
public class TakePhotoManager implements View.OnClickListener,GrantPermissionActivity.OnGrantedListener {
/**
* 权限列表:写权限 读权限 调用摄像头权限
*/
private static final String[] PERMISSIONS = new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE,
Manifest.permission.READ_EXTERNAL_STORAGE,Manifest.permission.CAMERA};
/* 上下文 */
private Activity context;
/* 对话框 */
private Dialog mSelectPhotoDialog;
/* 图片的存储地址-父路径 */
private String mHeadImageFileParentPath = "";
/* 照相机拍照后的照片 */
private String mCameraImageFileName = "";
/* 头像名称 */
private String mHeadImageFileName = "";
private Button mBtnTakePhoto;//拍照
private Button mBtnPickPhoto;//选择本地图片
private Button mBtnCancel;//取消
private Uri imageUri;//原图保存地址
public TakePhotoManager(Activity context) {
this.context = context;
mHeadImageFileParentPath = Environment.getExternalStorageDirectory() + File.separator+ context.getPackageName()+File.separator;
mCameraImageFileName = "temp_camera_image.jpg";
mHeadImageFileName = "tmp_head_image.jpg";
}
public void setmHeadImageFileParentPath(String mHeadImageFileParentPath) {
this.mHeadImageFileParentPath = mHeadImageFileParentPath;
}
public void setmCameraImageFileName(String mCameraImageFileName) {
this.mCameraImageFileName = mCameraImageFileName;
}
public void setmHeadImageFileName(String mHeadImageFileName) {
this.mHeadImageFileName = mHeadImageFileName;
}
/**
* 显示头像弹出窗
*/
public void showSelectPhotoDialog() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {//23
//Android6.0及以上，需要动态授予权限
// 验证所有权限是否都已经授权了
List<String> deniedPermissions = Utils.findDeniedPermissions(this.context, PERMISSIONS);
if (deniedPermissions.size() == 0) {
showDialog();
} else {
Intent intent = new Intent(this.context, GrantPermissionActivity.class);
intent.putExtra(GrantPermissionActivity.PARAM_PERMISSION_NAME_LIST, PERMISSIONS);
GrantPermissionActivity.mGrantedListener = this;
this.context.startActivity(intent);
}
}else{
showDialog();
}
}
private void showDialog(){
View view = context.getLayoutInflater().inflate(R.layout.dlg_select_photo,
null);
mBtnTakePhoto = (Button) view.findViewById(R.id.btn_take_photo);
mBtnPickPhoto = (Button) view.findViewById(R.id.btn_pick_photo);
mBtnCancel = (Button) view.findViewById(R.id.btn_cancel);
mBtnTakePhoto.setOnClickListener(this);
mBtnPickPhoto.setOnClickListener(this);
mBtnCancel.setOnClickListener(this);
mSelectPhotoDialog = UploadAvatarUtil.createDialog(context, view,
R.style.transparentFrameWindowStyle, R.style.select_photo_dialog_animstyle);
}
/**
* 关闭头像弹出窗
*/
public void hideSelectPhotoDialog() {
if (mSelectPhotoDialog != null && mSelectPhotoDialog.isShowing()) {
mSelectPhotoDialog.dismiss();
}
}
/**
* 拍照
*/
public void takePhoto(Activity context, String imgUrl, String imageFileNameTemp) {
File file = UploadAvatarUtil.getFile(imgUrl, imageFileNameTemp);
// 打开相机
Intent intentFromCapture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
//FileUriExposedException这个异常只会在Android 7.0 + 出现，当app使用file:// url 共享给其他app时， 会抛出这个异常。
//因为在android 6.0 + 权限需要 在运行时候检查， 其他app 可能没有读写文件的权限， 所以google在7.0的时候加上了这个限制。官方推荐使用 FileProvider 解决这个问题。
intentFromCapture.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION ); //添加这一句表示对目标应用临时授权该Uri所代表的文件
imageUri = FileProvider.getUriForFile(context, "com.hb.weex.accountant.fileprovider", file);//通过FileProvider创建一个content类型的Uri
} else {
imageUri = Uri.fromFile(file);
}
intentFromCapture.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);//将拍取的照片保存到指定URI
context.startActivityForResult(intentFromCapture, UploadAvatarUtil.CAMERA_REQUEST_CODE);
}
/**
* 选择本地图片
*/
public void pickPhoto(Activity context) {
Intent intent = new Intent(Intent.ACTION_PICK);
intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");
context.startActivityForResult(intent, UploadAvatarUtil.IMAGE_REQUEST_CODE);
}
public Object onActivityResult(Context context,int requestCode, int resultCode, Intent data) {
//关闭头像弹出窗
hideSelectPhotoDialog();
if (resultCode != Activity.RESULT_CANCELED) {
switch (requestCode) {
case UploadAvatarUtil.IMAGE_REQUEST_CODE:// 选择本地图片返回
if (null != data) {//为了取消选取不报空指针用的
imageUri = data.getData();
startPhotoZoom(context, imageUri , 1);
}
break;
case UploadAvatarUtil.CAMERA_REQUEST_CODE:// 拍照返回
if (UploadAvatarUtil.hasSdcard()) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {//24
startPhotoZoom(context, imageUri, 0);
}else{
File tempFile = getFileTmp();
startPhotoZoom(context, Uri.fromFile(tempFile), 0);
}
} else {
ToastUtil.showToast(context, context.getResources().getString(R.string.find_sdcard_none));
}
break;
case UploadAvatarUtil.CLIP_REQUEST_CODE:// 裁剪完成,删除照相机缓存的图片
Bitmap imageBitmap = null;
//获取头像文件
File file = getTmpHeadImage();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N){//24
try {
imageBitmap = BitmapFactory.decodeStream(context.getContentResolver().openInputStream(imageUri));
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}else {
if (!file.exists()) {
return null;
}
imageBitmap = BitmapFactory.decodeFile(file.getAbsolutePath());
}
if (imageBitmap == null) {
return null;
}
ByteArrayOutputStream baos = new ByteArrayOutputStream();
imageBitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
byte[] userImageData = http://www.mamicode.com/baos.toByteArray();"path", file.getAbsolutePath());
}
result.put("data",userImageData);
return result;
}
}
return null;
}
/**
* 裁剪图片
*
* @param uri from 1代表本地照片的裁剪，0代表拍照后的裁剪
*/
public void startPhotoZoom(Context context, Uri uri, int from) {
Intent intent = new Intent("com.android.camera.action.CROP");
String url = convertPath(context, uri);
/**
* 当满足：SDK>4.0、选择本地照片操作、裁剪框为圆形（或者说路径与之前版本有异）三个条件时
* 进行转换操作
*/
if (Build.VERSION.SDK_INT >= 19 && from == 1 && url != null) {
intent.setDataAndType(Uri.fromFile(new File(url)), "image/*");
} else {
intent.setDataAndType(uri, "image/*");
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION );
}
// 设置裁剪
intent.putExtra("crop", "true");
// aspectX aspectY 是宽高的比例
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
// outputX outputY 是裁剪图片宽高
intent.putExtra("outputX", 100);
intent.putExtra("outputY", 100);
Uri uriPath;
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) {//小于24
uriPath = Uri.fromFile(UploadAvatarUtil.getFile(mHeadImageFileParentPath, mHeadImageFileName));
}else{
uriPath = imageUri;
}
intent.putExtra(MediaStore.EXTRA_OUTPUT, uriPath);
intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
intent.putExtra("return-data", false);
//intent.putExtra("return-data", true);
//return-data为true时，会直接返回bitmap数据，但是大图裁剪时会出现问题。
//设置为false比较好，但是，需要指定MediaStore.EXTRA_OUTPUT，来保存裁剪之后的图片
((Activity)context).startActivityForResult(intent, UploadAvatarUtil.CLIP_REQUEST_CODE);
}
/**
* 删除缓存的头像
*/
public void deleteHeadCache() {
UploadAvatarUtil.deleteLocalImage(mHeadImageFileParentPath, mHeadImageFileName);
}
/**
* 获取文件对象---照相机拍照的
*
* @return
*/
public File getFileTmp() {
return UploadAvatarUtil.getFile(mHeadImageFileParentPath, mCameraImageFileName);
}
/**
* 获取裁剪之后的图片文件
*/
public File getTmpHeadImage(){
return UploadAvatarUtil.getFile(mHeadImageFileParentPath,mHeadImageFileName);
}
/**
* 删除照相机拍照的图片
*/
public void deleteCameraImage() {
UploadAvatarUtil.deleteLocalImage(mHeadImageFileParentPath, mCameraImageFileName);
}
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.btn_take_photo:
takePhoto(context, mHeadImageFileParentPath, mCameraImageFileName);
break;
case R.id.btn_pick_photo:
pickPhoto(context);
break;
case R.id.btn_cancel:
hideSelectPhotoDialog();
break;
}
}
/**
* 将uri转换成字符串
* 解决4.4版本以上获取到的uri是图片名称而非图片路径，导致剪裁图片时提示无法加载图片的问题
* 详细的解决方案，请参考这篇文章
* 当安卓的版本比较高时（如4.4），选择本地相册可能会返回“无法加载此图片”
* 原因：正常uri是file：//...而高版本是content：//...
* 所以需要一个转换操作
*
* @param context
* @param uri
* @return
*/
public String convertPath(final Context context, final Uri uri) {
//代表SDK4.4需要反射的类
Class getClass = null;
//代表两个SDK4.4里面反射的方法
Method isMethod;
Method getMethod;
String stringMethod = "";
//判断当前版本是否大于4.0
final boolean isKitKat = Build.VERSION.SDK_INT >= 19;
try {
/**
* 获取类和方法
* 方法传参方式
* 获取返回值
*/
getClass = Class.forName("android.provider.DocumentsContract");
getMethod = getClass.getMethod("getDocumentId", new Class[]{Uri.class});
isMethod = getClass.getMethod("isDocumentUri", new Class[]{Context.class, Uri.class});
Object isResult = isMethod.invoke(getClass, new Object[]{context, uri});
Object getResult = getMethod.invoke(getClass, new Object[]{uri});
stringMethod = (String) getResult;
if (!(Boolean) isResult)
return null;
//当手机SDK大于4.4且路径类型与以往不同时（isShot为True时往往裁剪框是圆形，即是新类型的路径）
if (isKitKat) {
if (isExternalStorageDocument(uri)) {
final String docId = stringMethod;
final String[] split = docId.split(":");
final String type = split[0];
if ("primary".equalsIgnoreCase(type)) {
return Environment.getExternalStorageDirectory() + "/" + split[1];
}
} else if (isDownloadsDocument(uri)) {
final String id = stringMethod;
final Uri contentUri = ContentUris.withAppendedId(
//高版本的路径不同于低版本，需要转换
Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
return getDataColumn(context, contentUri, null, null);
} else if (isMediaDocument(uri)) {
final String docId = stringMethod;
final String[] split = docId.split(":");
final String type = split[0];
Uri contentUri = null;
if ("image".equals(type)) {
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(type)) {
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(type)) {
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}
final String selection = "_id=?";
final String[] selectionArgs = new String[]{
split[1]
};
return getDataColumn(context, contentUri, selection, selectionArgs);
}
} else if ("content".equalsIgnoreCase(uri.getScheme())) {
if (isGooglePhotosUri(uri))
return uri.getLastPathSegment();
return getDataColumn(context, uri, null, null);
} else if ("file".equalsIgnoreCase(uri.getScheme())) {
return uri.getPath();
}
return null;
} catch (Exception e) {
Log.e("error", e.toString());
}
return null;
}
//获取String类型的路径
public static String getDataColumn(Context context, Uri uri, String selection,
String[] selectionArgs) {
Cursor cursor = null;
final String column = "_data";
final String[] projection = {
column
};
try {
cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,
null);
if (cursor != null && cursor.moveToFirst()) {
final int index = cursor.getColumnIndexOrThrow(column);
return cursor.getString(index);
}
} finally {
if (cursor != null)
cursor.close();
}
return null;
}
public static boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri.getAuthority());
}
public static boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}
public static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
public static boolean isGooglePhotosUri(Uri uri) {
return "com.google.android.apps.photos.content".equals(uri.getAuthority());
}
@Override
public void onGrantSuccess() {
showDialog();
}
}
在7.0 上使用FileProvider来获取图片的路径，需要以下几步设置：
（1）在Androidmainfest的Application根标签中设置provider,相机，读写文件权限
<!-- Android7.0以上，拍照需要设置FileProvider -->
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.hb.accountant.accountant.fileprovider"
android:grantUriPermissions="true"
android:exported="false">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths" />
</provider>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.CAMERA"/>
（2）在res/xml目录中创建文件file_paths.xml:
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<!--external-path 就是用来指定URI共享的
name属性的值可以随便写
path属性的值表示共享的具体位置，设置空就表示将整个SD卡进行共享
用该路径保存的好处是，文件会随着应用的卸载而删除,file/header/为自定义路径
Android/data/com.bugull.cameratakedemo/files/header/
-->
<!--<external-path name = "my-images" path = "demo"/>-->
<paths>
<external-path path="包名" name="camera_photos" />
</paths>
</paths>
注：文件中涉及的其他文件如下：
(1)动态权限授权使用第三方PermissionGen
（2）UploadAvatarUtil.java
package com.hb.weex.util;
import android.app.Activity;
import android.app.Dialog;
import android.content.Context;
import android.content.Intent;
import android.graphics.*;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.LayerDrawable;
import android.net.Uri;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import com.hb.common.android.util.Log;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
/**
* 上传用户头像
* 功能如下：
* 1、保存图片到本地、删除本地图片
* 2、拍照、从图库中选择照片、剪裁
* 3、创建文件目录、获取文件对象
* 4、检查Sdcard是否存在
* 5、创建圆角矩形图片
* 6、创建圆角图片
* 7、自定义从下往上显示的Dialog（模仿QQ退出效果）
* 8、图片上绘制文字
* Created by cjy on 2015/4/9.
*/
public class UploadAvatarUtil {
public static final int IMAGE_REQUEST_CODE = 0; //选择本地图片
public static final int CAMERA_REQUEST_CODE = 1; //拍照
public static final int CLIP_REQUEST_CODE = 2; //裁剪
private static final int DEFAULT_TEXT_SIZE = 32;//默认的字体大小
/**
* 检查是否存在sdcard
*
* @return
*/
public static boolean hasSdcard() {
String state = Environment.getExternalStorageState();
if (state.equals(Environment.MEDIA_MOUNTED)) {
return true;
} else {
return false;
}
}
/**
* 创建文件目录
*
* @param filePath 文件路径
*/
public static File makeFileDir(String filePath) {
File file = null;
try {
file = new File(filePath);
if (!file.exists()) {
file.mkdirs();
}
} catch (Exception e) {
e.printStackTrace();
}
return file;
}
/**
* 获取文件对象
*
* @param filePath 文件路径
* @param fileName 文件名称
* @return
*/
public static File getFile(String filePath, String fileName) {
File file = null;
//创建文件目录
makeFileDir(filePath);
try {
file = new File(filePath + fileName);
} catch (Exception e) {
e.printStackTrace();
}
return file;
}
/**
* 保存图片到本地
*
* @param imgUrl 图片路径
* @param imageFileName 图片名称
* @param bitmap
*/
public static void saveLocalImage(String imgUrl, String imageFileName, Bitmap bitmap) {
try {
File f = getFile(imgUrl, imageFileName);
FileOutputStream fOut = new FileOutputStream(f);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, fOut);
fOut.flush();
fOut.close();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 删除本地图片
*
* @param imgUrl 图片路径
* @param imageFileName 图片名称
*/
public static void deleteLocalImage(String imgUrl, String imageFileName) {
File f = getFile(imgUrl, imageFileName);
if (f.isFile() && f.exists()) {
f.delete();
}
}
/**
* 绘制圆角矩形图片
* 圆形 x=120,y=120,outerRadiusRat=60
*
* @param x
* @param y
* @param image
* @param outerRadiusRat
* @return
*/
public static Bitmap createFramedPhoto(int x, int y, Bitmap image,
float outerRadiusRat) {
// 根据源文件新建一个darwable对象
Drawable imageDrawable = new BitmapDrawable(image);
// 新建一个新的输出图片
Bitmap output = Bitmap.createBitmap(x, y, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(output);
// 新建一个矩形
RectF outerRect = new RectF(0, 0, x, y);
// 产生一个白色的圆角矩形
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
paint.setColor(Color.RED);
canvas.drawRoundRect(outerRect, outerRadiusRat, outerRadiusRat, paint);
// 将源图片绘制到这个圆角矩形上
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
imageDrawable.setBounds(0, 0, x, y);
canvas.saveLayer(outerRect, paint, Canvas.ALL_SAVE_FLAG);
imageDrawable.draw(canvas);
canvas.restore();
return output;
}
/**
* 选择本地图片
*/
public static void pickPhoto(Context context) {
Intent intentFromGallery = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intentFromGallery.setType("image/*"); // 设置文件类型
intentFromGallery.setAction(Intent.ACTION_GET_CONTENT);
((Activity) context).startActivityForResult(intentFromGallery, IMAGE_REQUEST_CODE);
}
/**
* 拍照
*/
public static void takePhoto(Context context, String imgUrl, String imageFileNameTemp) {
// 打开相机
Intent intentFromCapture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// 判断存储卡是否可以用,存储缓存图片
if (hasSdcard()) {
intentFromCapture.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(getFile(imgUrl, imageFileNameTemp)));
}
((Activity) context).startActivityForResult(intentFromCapture, CAMERA_REQUEST_CODE);
}
/**
* 裁剪图片
*
* @param uri
*/
public static void startPhotoZoom(Context context, Uri uri) {
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setDataAndType(uri, "image/*");
// 设置裁剪
intent.putExtra("crop", "true");
// aspectX aspectY 是宽高的比例
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
// outputX outputY 是裁剪图片宽高
intent.putExtra("outputX", 200);
intent.putExtra("outputY", 200);
intent.putExtra("return-data", true);
// intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
// intent.putExtra("return-data", false);//设置为不返回数据
((Activity) context).startActivityForResult(intent, CLIP_REQUEST_CODE);
}
/**
* 创建指定样式、指定动画的Dialog
*
* @param context
* @param view Dialog的布局
* @param styleId Dialog的样式
* @param animStyleId Dialog的动画样式
* @return
*/
public static Dialog createDialog(Context context, View view, int styleId, int animStyleId) {
Dialog mSelectPhotoDialog = new Dialog(context, styleId);
mSelectPhotoDialog.setContentView(view);
Window window = mSelectPhotoDialog.getWindow();
// 设置显示动画
window.setWindowAnimations(animStyleId);
WindowManager.LayoutParams wl = window.getAttributes();
wl.x = 0;
wl.y = ((Activity) context).getWindowManager().getDefaultDisplay().getHeight();
// 以下这两句是为了保证按钮可以水平满屏
wl.width = ViewGroup.LayoutParams.MATCH_PARENT;
wl.height = ViewGroup.LayoutParams.WRAP_CONTENT;
// 设置显示位置
mSelectPhotoDialog.onWindowAttributesChanged(wl);
// 设置点击外围解散
mSelectPhotoDialog.setCanceledOnTouchOutside(true);
mSelectPhotoDialog.show();
return mSelectPhotoDialog;
}
/**
* 第1种方法：图片上绘制文字
*
* @param context
* @param drawableId
* @param text
* @param color
* @return
*/
public static Bitmap drawTextAtBitmap(Context context, int drawableId, String text, int color, float density) {
Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), drawableId);
int[] size = getBitmapSize(context, drawableId);
// Log.e("density", density + "");
int x = size[0];
int y = size[1];
// int x = (int) (size[0] * density);
// int y = (int) (size[1] * density);
// Log.e("x", x + "");
// Log.e("y", y + "");
// bitmap = getScaleBitmap(context,bitmap);
// 创建一个和原图同样大小的位图
Bitmap newbit = Bitmap.createBitmap(x, y, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(newbit);
Paint paint = new Paint();
// 贴图 在原始位置0，0插入原图
canvas.drawBitmap(bitmap, 0, 0, paint);
paint.setColor(color);
int textSize = DEFAULT_TEXT_SIZE;
if (density >= 3) {
textSize *= (density + 1);
} else if (density >= 2) {
textSize *= (density + 0.1);
}
paint.setTextSize(textSize);
paint.setTextAlign(Paint.Align.CENTER);
// 在原图指定位置写上字
// canvas.drawText(text, x / 2 - 10 * density, y / 2, paint);
canvas.drawText(text, x / 2, y / 2 + 20 * (density-1) + 2, paint);
canvas.save(Canvas.ALL_SAVE_FLAG);
// 存储
canvas.restore();
return newbit;
}
/**
* 图片叠加
*
* @param bitmap1
* @param bitmap2
* @return
*/
public static Bitmap layerBitmap(Bitmap bitmap1, Bitmap bitmap2) {
// copy 防止出现Immutable bitmap passed to Canvas constructor错误
bitmap1 = bitmap1.copy(Bitmap.Config.ARGB_8888, true);
Bitmap newBitmap = null;
newBitmap = Bitmap.createBitmap(bitmap1);
Canvas canvas = new Canvas(newBitmap);
Paint paint = new Paint();
int w = bitmap1.getWidth();
int h = bitmap1.getHeight();
int w_2 = bitmap2.getWidth();
int h_2 = bitmap2.getHeight();
paint.setColor(Color.GRAY);
paint.setAlpha(125);
canvas.drawRect(0, 0, bitmap1.getWidth(), bitmap1.getHeight(), paint);
paint = new Paint();
canvas.drawBitmap(bitmap2, Math.abs(w - w_2) / 2,
Math.abs(h - h_2) / 2, paint);
canvas.save(Canvas.ALL_SAVE_FLAG);
// 存储新合成的图片
canvas.restore();
return newBitmap;
}
/**
* 图片叠加
*
* @param bitmap1
* @param bitmap2
* @return
*/
public static LayerDrawable layerDrawable(Bitmap bitmap1, Bitmap bitmap2) {
Drawable[] array = new Drawable[2];
array[0] = new BitmapDrawable(bitmap1);
array[1] = new BitmapDrawable(bitmap2);
LayerDrawable la = new LayerDrawable(array);
// 其中第一个参数为层的索引号，后面的四个参数分别为left、top、right和bottom
la.setLayerInset(0, 0, 0, 0, 0);
la.setLayerInset(1, 10, 10, 10, 10);
return la;
}
/**
* 获取Bitmap的宽高
*
* @param context
* @param drawableId 图片id
* @return
*/
private static int[] getBitmapSize(Context context, int drawableId) {
int[] size = new int[2];
BitmapFactory.Options opts = new BitmapFactory.Options();
opts.inJustDecodeBounds = true;
BitmapFactory.decodeResource(context.getResources(), drawableId, opts);
int width = opts.outWidth;
int height = opts.outHeight;
size[0] = width;
size[1] = height;
return size;
}
/**
* 等比例缩放
*
* @param context
* @param bitmap
* @return
*/
public static Bitmap getScaleBitmap(Context context, Bitmap bitmap) {
int[] screen = ScreenPixelsUtil.getScreenPixels(context);
Matrix matrix = new Matrix();
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Log.e("Width", width + "");
Log.e("Height", height + "");
//屏幕宽度/图片宽度
float w = screen[0] / width;
float h = screen[1] / height;
matrix.postScale(w, h);// 获取缩放比例
// 根据缩放比例获取新的位图
Bitmap newbmp = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true);
return newbmp;
}
}
(3)资源文件：
dlg_select_photo.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/pop_layout"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/transparent"
android:gravity="bottom"
android:layout_gravity="center_horizontal"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:paddingBottom="10dp"
>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/setting_dialog"
>
<Button
android:id="@+id/btn_take_photo"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/take_photo"
android:paddingTop="14dp"
android:paddingBottom="14dp"
android:layout_marginTop="2dp"
android:layout_marginLeft="4dp"
android:layout_marginRight="4dp"
android:textSize="17dp"
android:textColor="#333333"
android:background="@color/white"/>
<View android:layout_width="match_parent"
android:layout_height="0.5dp"
android:background="@color/dropdownmenu_line"/>
<Button
android:id="@+id/btn_pick_photo"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/pick_photo"
android:paddingTop="14dp"
android:paddingBottom="14dp"
android:layout_marginLeft="4dp"
android:layout_marginRight="4dp"
android:textSize="17dp"
android:textColor="#333333"
android:background="@color/white"/>
</LinearLayout>
<Button
android:id="@+id/btn_cancel"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="取消"
android:paddingTop="14dp"
android:paddingBottom="14dp"
android:textSize="17dp"
android:textColor="@color/gray"
android:background="@drawable/setting_dialog"
android:layout_marginTop="16dp"/>
</LinearLayout>
styles.xml
<!-- 头像弹出窗的动画效果 -->
<style name="select_photo_dialog_animstyle">
<item name="android:windowEnterAnimation">@anim/photo_dialog_in_anim</item>
<item name="android:windowExitAnimation">@anim/photo_dialog_out_anim</item>
</style>
drawable
//photo_dialog_in_anim.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<translate
android:duration="500"
android:fromXDelta="0"
android:fromYDelta="1000"
android:toXDelta="0"
android:toYDelta="0" />
</set>
//photo_dialog_out_anim.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<translate
android:duration="500"
android:fromXDelta="0"
android:fromYDelta="0"
android:toXDelta="0"
android:toYDelta="1000" />
</set>
拍照、本地图片工具类（兼容至Android7.0）
声明：以上内容来自用户投稿及互联网公开渠道收集整理发布，本网站不拥有所有权，未作人工编辑处理，也不承担相关法律责任，若内容有误或涉及侵权可进行投诉： 投诉/举报 工作人员会在5个工作日内联系你，一经查实，本站将立刻删除涉嫌侵权内容。