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android 解决小米手机上选择照片路径为null情况
下返回的路径 为null,在网上搜索了下解决方案,现在把解决方案记录下:
这是在onActivityResult方法中执行的,
- if (data == null) {
- return;
- }
- uri = data.getData();
- uri = geturi(data);//解决方案
- String[] proj = { MediaStore.Images.Media.DATA };
- Cursor cursor = managedQuery(uri, proj, null, null, null);
- if(cursor!=null){
- int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
- cursor.moveToFirst();
- String path = cursor.getString(column_index);// 图片在的路径
- Intent intent3 = new Intent(this, SYClipActivity.class);
- intent3.putExtra("path", path);
- startActivityForResult(intent3, IMAGE_COMPLETE);
- }
- /**
- * 解决小米手机上获取图片路径为null的情况
- * @param intent
- * @return
- */
- public Uri geturi(android.content.Intent intent) {
- Uri uri = intent.getData();
- String type = intent.getType();
- if (uri.getScheme().equals("file") && (type.contains("image/"))) {
- String path = uri.getEncodedPath();
- if (path != null) {
- path = Uri.decode(path);
- ContentResolver cr = this.getContentResolver();
- StringBuffer buff = new StringBuffer();
- buff.append("(").append(Images.ImageColumns.DATA).append("=")
- .append("‘" + path + "‘").append(")");
- Cursor cur = cr.query(Images.Media.EXTERNAL_CONTENT_URI,
- new String[] { Images.ImageColumns._ID },
- buff.toString(), null, null);
- int index = 0;
- for (cur.moveToFirst(); !cur.isAfterLast(); cur.moveToNext()) {
- index = cur.getColumnIndex(Images.ImageColumns._ID);
- // set _id value
- index = cur.getInt(index);
- }
- if (index == 0) {
- // do nothing
- } else {
- Uri uri_temp = Uri
- .parse("content://media/external/images/media/"
- + index);
- if (uri_temp != null) {
- uri = uri_temp;
- }
- }
- }
- }
- return uri;
- }
在此记录下,
来源:http://blog.csdn.net/coderinchina/article/details/50799501
http://blog.csdn.net/iamwutianbao/article/details/52459509
小米手机选择了图片之后,小米机会崩掉(别的机子,啥版本都没问题)。看异常信息,指示cursor.moveToFirst(),空指针异常。也就是说,cursor为空。是uri的问题,4.4之前,返回的是包含图片绝对路劲的,4.4之后,返回的不再是绝对路劲了,而是一个图片的编码。小米不论版本高低,小米机会崩掉,得到的只是一个图片编码。这时需要去转换为绝对路径,才能方便使用。下面方法是可以得到绝对路径的方法,是大神封装好了,封装成了一个pictureHelper工具类。
吐槽一下,除了小米,用ACTION_PICK,都能得到一个图片的绝对路径。如果是小米,用ACTION_PICK,就需要去转化了。但是,小米用ACTION_GET_CONTENT或者ACTION_OPEN_DOCUMENT,低版本,也能得到绝对路径。。最后统一的处理方法就是,用ACTION_GET_CONTENT,然后分版本处理,低版本还是旧的方法,高版本,用pictureHelper工具类处理得到绝对路径。
- package com.xxxe.utils;
- import android.annotation.SuppressLint;
- import android.content.ContentUris;
- import android.content.Context;
- import android.database.Cursor;
- import android.net.Uri;
- import android.os.Build;
- import android.os.Environment;
- import android.provider.DocumentsContract;
- import android.provider.MediaStore;
- /**
- * 小米手机获取本地相册图片出现空指针异常处理类
- * @author dec
- *
- */
- public class MiPictureHelper {
- @SuppressLint("NewApi")
- public static String getPath(final Context context, final Uri uri) {
- final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
- // DocumentProvider
- if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
- // ExternalStorageProvider
- if (isExternalStorageDocument(uri)) {
- final String docId = DocumentsContract.getDocumentId(uri);
- final String[] split = docId.split(":");
- final String type = split[0];
- if ("primary".equalsIgnoreCase(type)) {
- return Environment.getExternalStorageDirectory() + "/" + split[1];
- }
- }
- // DownloadsProvider
- else if (isDownloadsDocument(uri)) {
- final String id = DocumentsContract.getDocumentId(uri);
- final Uri contentUri = ContentUris.withAppendedId(
- Uri.parse("content://downloads/public_downloads"),
- Long.valueOf(id));
- return getDataColumn(context, contentUri, null, null);
- }
- // MediaProvider
- else if (isMediaDocument(uri)) {
- final String docId = DocumentsContract.getDocumentId(uri);
- 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);
- }
- }
- // MediaStore (and general)
- else if ("content".equalsIgnoreCase(uri.getScheme())) {
- // Return the remote address
- if (isGooglePhotosUri(uri))
- return uri.getLastPathSegment();
- return getDataColumn(context, uri, null, null);
- }
- // File
- else if ("file".equalsIgnoreCase(uri.getScheme())) {
- return uri.getPath();
- }
- return null;
- }
- 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());
- }
- private static boolean isGooglePhotosUri(Uri uri) {
- return "com.google.android.apps.photos.content".equals(uri.getAuthority());
- }
- }
如果是想要获取相册中图片的路径,直接这样调用:
- protected void onActivityResult(int requestCode, int resultCode, Intent data) {
- switch (requestCode) {
- case PICK_PICTURE:
- // 选取照片
- if(data!=null){
- try {
- Uri uri = data.getData();
- String pickPath = MiPictureHelper.getPath(mContext, uri); // 获取图片路径的方法调用
- System.out.println("图片路径 -->> " + pickPath);
- }
- }
- }
- }
- }
====================== 我是一条分割线 ==========================
下面是其他开发者的处理方法
- * 解决小米手机上获取图片路径为null的情况
- * @param intent
- * @return
- */
- public Uri getPictureUri(android.content.Intent intent) {
- Uri uri = intent.getData();
- String type = intent.getType();
- if (uri.getScheme().equals("file") && (type.contains("image/"))) {
- String path = uri.getEncodedPath();
- if (path != null) {
- path = Uri.decode(path);
- ContentResolver cr = this.getContentResolver();
- StringBuffer buff = new StringBuffer();
- buff.append("(").append(Images.ImageColumns.DATA).append("=")
- .append("‘" + path + "‘").append(")");
- Cursor cur = cr.query(Images.Media.EXTERNAL_CONTENT_URI,
- new String[] { Images.ImageColumns._ID },
- buff.toString(), null, null);
- int index = 0;
- for (cur.moveToFirst(); !cur.isAfterLast(); cur.moveToNext()) {
- index = cur.getColumnIndex(Images.ImageColumns._ID);
- // set _id value
- index = cur.getInt(index);
- }
- if (index == 0) {
- // do nothing
- } else {
- Uri uri_temp = Uri
- .parse("content://media/external/images/media/"
- + index);
- if (uri_temp != null) {
- uri = uri_temp;
- }
- }
- }
- }
- return uri;
- }
他们这样调用方法:
- <span style="white-space:pre"> </span>if (data == null) {
- return;
- }
- uri = data.getData();
- uri = getPictureUri(data); // 方法调用
- String[] proj = { MediaStore.Images.Media.DATA };
- Cursor cursor = managedQuery(uri, proj, null, null, null);
- if(cursor!=null) {
- int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
- cursor.moveToFirst();
- String path = cursor.getString(column_index);// 图片在的路径
- Intent intent3 = new Intent(this, SYClipActivity.class);
- intent3.putExtra("path", path);
- startActivityForResult(intent3, IMAGE_COMPLETE);
- }
android 解决小米手机上选择照片路径为null情况