Android定制|Android定制 - 预制视频音乐等资源到/storage/sdcard0/ Android定制-预制视频音乐等资源

Rom定制，最常见的就是内置客户提供的视频音乐等文件了，并且要求删除后恢复出厂设置资源还在，对于此类问题，貌似MTK也提供了方法，不过mtk给的方法，代码不好管控
我们可以把资源随Rom放到手机里，再拷到storage目录里
1.在system/media/resource放个Android.mk文件，用于拷贝到out的system/media（此路径可以通过获取Environment.getRootDirectory().getPath() -> /system ）
2.每次开机完成的时候，MediaProvider的MediaScannerReceiver.Java都会去接收开机完成的广播，我们可以在这里面进行文件拷贝
packages/providers/MediaProvider/src/com/android/providers/media/MediaScannerReceiver.java

@Override public void onReceive(Context context, Intent intent) { sharedPreferences = context.getSharedPreferences("first_boot",Context.MODE_PRIVATE); boolean first_boot= sharedPreferences.getBoolean("first_boot", true); //如果是第一次开机，则sharedPreferences 的值为空，赋值true if (first_boot) { Intent activityIntent = new Intent(); activityIntent.setClassName("com.android.providers.media", "com.android.providers.media.CopyFileService"); context.startService(activityIntent); //启动拷贝文件的Services，由于文件比较大，onReceive方法里不能做耗时操作，可以用service解决 } SharedPreferences.Editor editor = sharedPreferences.edit(); editor.putBoolean("first_boot", false); //赋值false，表示下次开机不用再拷贝了 editor.commit();

【Android定制|Android定制 - 预制视频音乐等资源到/storage/sdcard0/】至于CopyFileService.java代码，就是一个文件拷贝过程，从/system/media/resource拷贝到/storage/sdcard0的过程

private void start() { Intent activityIntent = new Intent();
 activityIntent.setClassName("com.smile.weathertest", "com.android.providers.media.CopyFileService");
 startService(activityIntent);
 }

package com.android.providers.media; import android.app.Service; import android.content.Intent; import android.os.Environment; import android.os.IBinder; import android.util.Log; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; public class CopyFileService extends Service {private final static String TAG = CopyFileService.class.getSimpleName(); private static String PRELOAD_SRC = https://www.it610.com/article/Environment.getRootDirectory()+"/loadmedia"; //*** 这个路径是/system/loadmedia private static String PRELOAD_DEST = "/storage/sdcard0/preload"; private CopyThread mCopyThread; @Override public IBinder onBind(Intent intent) { return null; }@Override public void onCreate() { super.onCreate(); }@Override public int onStartCommand(Intent intent, int flags, int startId) { if (mCopyThread == null) { mCopyThread = new CopyThread(); mCopyThread.start(); } return Service.START_REDELIVER_INTENT; }public class CopyThread extends Thread { @Override public void run() { if (copyFolder(new File(PRELOAD_SRC), new File(PRELOAD_DEST))) { Log.e(TAG, "doPreloadMedia success !"); } else { Log.e(TAG, "doPreloadMedia failed 。"); } stopSelf(); } }public boolean copyFolder(File srcFile, File destFile) { if (!srcFile.isDirectory()) { Log.i(TAG, "srcFile no isDirectory :"+srcFile.getName()); return false; } if (!srcFile.canRead()) { Log.i(TAG, "no canRead :"+srcFile.getName()); } if (!srcFile.canWrite()) { Log.i(TAG, "no canWrite :"+srcFile.getName()); }if (!destFile.exists()) { boolean r = false; synchronized (this) { r = destFile.mkdirs(); } Log.i(TAG, "destFile:exists " + r); } boolean result = true; File[] list = srcFile.listFiles(); if (list == null) { Log.i(TAG, "copyFolder: list null =" + srcFile.getName()); return false; } for (File f : list) { if (f.isDirectory()) { result &= copyFolder(f, new File(destFile, f.getName())); } else if(f.isFile()){ result &= copyFile(f, new File(destFile, f.getName())); } } return result; }public boolean copyFile(File srcFile, File destFile) { boolean result = false; try { InputStream in = new FileInputStream(srcFile); try { result = copyToFile(in, destFile); } finally { in.close(); } } catch (IOException e) { result = false; } return result; }/** * Copy data from a source stream to destFile. * Return true if succeed, return false if failed. */ public boolean copyToFile(InputStream inputStream, File destFile) { try { if (destFile.exists()) { destFile.delete(); } FileOutputStream out = new FileOutputStream(destFile); try { byte[] buffer = new byte[4096]; int bytesRead; while ((bytesRead = inputStream.read(buffer)) >= 0) { out.write(buffer, 0, bytesRead); } } finally { out.flush(); try { out.getFD().sync(); } catch (IOException e) { } out.close(); } return true; } catch (IOException e) { return false; } } }