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Android 下载APK 安装APK 打开APK
今天有了一个这样的需求 :下载一个apk文件,然后当你下载完成后,按钮的文字发生改变,变成点击安装,然后安装完成之后,变成打开。
这是下载apk的方法:
/** * 后台在下面一个Apk 下载完成后返回下载好的文件 * * @param httpUrl * @return */ private File downFile(final String httpUrl) { new Thread(new Runnable() { @Override public void run() { try { URL url = new URL(httpUrl); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("GET"); connection.setConnectTimeout(5000); FileOutputStream fileOutputStream = null; InputStream inputStream; if (connection.getResponseCode() == 200) { inputStream = connection.getInputStream(); if (inputStream != null) { file = getFile(httpUrl); fileOutputStream = new FileOutputStream(file); byte[] buffer = new byte[1024]; int length = 0; while ((length = inputStream.read(buffer)) != -1) { fileOutputStream.write(buffer, 0, length); } fileOutputStream.close(); fileOutputStream.flush(); } inputStream.close(); } System.out.println("已经下载完成"); // 往handler发送一条消息 更改button的text属性 Message message = handler.obtainMessage(); message.what = 1; handler.sendMessage(message); } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }).start(); return file; }
/** * 安装APK */ private void installApk() { Intent intent = new Intent(Intent.ACTION_VIEW); intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive"); startActivity(intent); }
这是打开APK的方法:
/** * 打开已经安装好的apk */ private void openApk(Context context, String url) { PackageManager manager = context.getPackageManager(); // 这里的是你下载好的文件路径 PackageInfo info = manager.getPackageArchiveInfo(Environment.getExternalStorageDirectory().getAbsolutePath() + getFilePath(url), PackageManager.GET_ACTIVITIES); if (info != null) { Intent intent = manager.getLaunchIntentForPackage(info.applicationInfo.packageName); startActivity(intent); } }打开APK 这里弄了好久,之前不知道有个getLaunchIntentForPackage方法 这个方法只要你能得到这个apk的报名,然后将包名加到后面,startActivity 它就会自动自动你的APK的主界面了。相信得到一个APK的的信息这个大家都会了,这里就不说了。
下面是我的所有代码:
/** * 下载Apk 安装Apk 打开APK * * @author Administrator * */ public class MainActivity extends Activity { private Button button1; private static final String URL_STRING = "http://gdown.baidu.com/data/wisegame/b7d7e4efd8199dea/tianyiyuedu_310.apk"; private static int down = 0; File file; private Handler handler = new Handler() { @Override public void handleMessage(Message msg) { super.handleMessage(msg); switch (msg.what) { case 1: button1.setText("点击安装"); down = 1; break; case 2: down = 2; button1.setText("打开"); break; } } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); button1 = (Button) findViewById(R.id.button1); button1.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // 下载apk if (down == 0) { downFile(URL_STRING); button1.setText("正在下载"); // 安装APK } else if (down == 1) { installApk(); // 打开apk } else if (down == 2) { openApk(MainActivity.this, URL_STRING); } } }); } // 接收到安装完成apk的广播 BroadcastReceiver broadcastReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { System.out.println("接收到安装完成apk的广播"); Message message = handler.obtainMessage(); message.what = 2; handler.sendMessage(message); } }; /** * 后台在下面一个Apk 下载完成后返回下载好的文件 * * @param httpUrl * @return */ private File downFile(final String httpUrl) { new Thread(new Runnable() { @Override public void run() { try { URL url = new URL(httpUrl); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("GET"); connection.setConnectTimeout(5000); FileOutputStream fileOutputStream = null; InputStream inputStream; if (connection.getResponseCode() == 200) { inputStream = connection.getInputStream(); if (inputStream != null) { file = getFile(httpUrl); fileOutputStream = new FileOutputStream(file); byte[] buffer = new byte[1024]; int length = 0; while ((length = inputStream.read(buffer)) != -1) { fileOutputStream.write(buffer, 0, length); } fileOutputStream.close(); fileOutputStream.flush(); } inputStream.close(); } System.out.println("已经下载完成"); // 往handler发送一条消息 更改button的text属性 Message message = handler.obtainMessage(); message.what = 1; handler.sendMessage(message); } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }).start(); return file; } /** * 安装APK */ private void installApk() { Intent intent = new Intent(Intent.ACTION_VIEW); intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive"); startActivity(intent); } @Override protected void onStart() { super.onStart(); IntentFilter intentFilter = new IntentFilter(); intentFilter.addAction(Intent.ACTION_PACKAGE_ADDED); intentFilter.addDataScheme("package"); // 注册一个广播 registerReceiver(broadcastReceiver, intentFilter); } @Override protected void onDestroy() { super.onDestroy(); // 解除广播 unregisterReceiver(broadcastReceiver); } /** * 打开已经安装好的apk */ private void openApk(Context context, String url) { PackageManager manager = context.getPackageManager(); // 这里的是你下载好的文件路径 PackageInfo info = manager.getPackageArchiveInfo(Environment.getExternalStorageDirectory().getAbsolutePath() + getFilePath(url), PackageManager.GET_ACTIVITIES); if (info != null) { Intent intent = manager.getLaunchIntentForPackage(info.applicationInfo.packageName); startActivity(intent); } } /** * 根据传过来url创建文件 * */ private File getFile(String url) { File files = new File(Environment.getExternalStorageDirectory().getAbsoluteFile(), getFilePath(url)); return files; } /** * 截取出url后面的apk的文件名 * * @param url * @return */ private String getFilePath(String url) { return url.substring(url.lastIndexOf("/"), url.length()); } }
IntentFilter filter = new IntentFilter(); filter.addAction("android.intent.action.PACKAGE_ADDED"); filter.addAction("android.intent.action.PACKAGE_REMOVED"); filter.addDataScheme("package");
监听安装apk和卸载apk的广播,其它的相信大家看代码也能看懂了,代码有点粗糙(菜鸟一枚),有哪里写的不好的地方,欢迎大家指正。
这个程序我没有考虑其他的情况,比如apk安装出错了,要怎么处理,等等。。
忘记说了,还需要在配置文件中添加访问网络和往sd卡写文件的权限:
<uses-permission android:name="android.permission.INTERNET"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
源代码的下载地址
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