MTK（Android(安卓)N）设置SDCard为默认存储

思路：当系统将所有存储挂载完毕，然后调用StorageManagerEx.setDefaultPath(path)设置默认存储，当用户手动改变以后就跟随用户设置。

diff --git a/packages/apps/Settings/src/com/mediatek/settings/deviceinfo/StorageSettingsExts.java b/packages/apps/Settings/src/com/mediatek/settings/deviceinfo/StorageSettingsExts.javaold mode 100644new mode 100755index 445c7d5..0944468--- a/packages/apps/Settings/src/com/mediatek/settings/deviceinfo/StorageSettingsExts.java+++ b/packages/apps/Settings/src/com/mediatek/settings/deviceinfo/StorageSettingsExts.java@@ -20,6 +20,9 @@ import com.mediatek.storage.StorageManagerEx; import java.util.ArrayList; import java.util.Collections; import java.util.List;+/*[email protected] modify SDCard to default storage 20170818*/+import android.provider.Settings;+/*End of by gxk*/ public class StorageSettingsExts {     private static final String TAG = "StorageSettings";@@ -114,6 +117,11 @@ public class StorageSettingsExts {                 }                 StorageManagerEx.setDefaultPath(preference.getKey());                 Log.d(TAG, "Set default path : " + preference.getKey());+/*[email protected] modify SDCard to default storage 20170818*/+                if (com.android.featureoption.FeatureOption.PRJ_FEATURE_REVO_B_SET_DEFAULT_STORAGE){+                    Settings.System.putInt(mActivity.getContentResolver(), "isUserSet", 1);+                }+/*End of by gxk*/                 mDeafultWritePathPref = (RadioButtonPreference) preference;                 return true;             }diff --git a/packages/providers/MediaProvider/src/com/android/providers/media/MediaScannerReceiver.java b/packages/providers/MediaProvider/src/com/android/providers/media/MediaScannerReceiver.javaold mode 100644new mode 100755index 9c9df73..15b2d93--- a/packages/providers/MediaProvider/src/com/android/providers/media/MediaScannerReceiver.java+++ b/packages/providers/MediaProvider/src/com/android/providers/media/MediaScannerReceiver.java@@ -40,6 +40,13 @@ import android.os.storage.StorageVolume; import android.os.SystemProperties; import android.preference.PreferenceManager; import android.provider.MediaStore;+/*[email protected] modify SDCard to default storage 20170818*/+import com.mediatek.storage.StorageManagerEx;+import java.util.ArrayList;+import java.util.List;+import android.provider.Settings;+import com.android.featureoption.FeatureOption;+/*End of by gxk*/ public class MediaScannerReceiver extends BroadcastReceiver {@@ -58,10 +65,19 @@ public class MediaScannerReceiver extends BroadcastReceiver     static boolean sIsShutdown = !"def_value".equals(SystemProperties.get(             "sys.shutdown.requested", "def_value"));     private static final String DEVICE_MOUNT_BEFORE_BOOT = "dev.mount_before_boot";+/*[email protected] modify SDCard to default storage 20170818*/+    private StorageManager storageManager;+    private int isUserSet = 0;+/*End of by gxk*/     @Override     public void onReceive(Context context, Intent intent) {         final String action = intent.getAction();+/*[email protected] modify SDCard to default storage 20170818*/+        storageManager = (StorageManager) context.getSystemService(Context.STORAGE_SERVICE);+        if (FeatureOption.PRJ_FEATURE_REVO_B_SET_DEFAULT_STORAGE)+            isUserSet = Settings.System.getInt(context.getContentResolver(), "isUserSet", 0);+/*End of by gxk*/         MtkLog.v(TAG, "onReceive action = " + action);         if (Intent.ACTION_BOOT_COMPLETED.equals(action)) {             MtkLog.v(TAG, "onReceive BOOT_COMPLETED, begin to scan internal and external storage.");@@ -192,7 +208,7 @@ public class MediaScannerReceiver extends BroadcastReceiver      * @return      */     private boolean isAllStorageMounted(Context context) {-        StorageManager storageManager = (StorageManager) context.getSystemService(Context.STORAGE_SERVICE);+        // StorageManager storageManager = (StorageManager) context.getSystemService(Context.STORAGE_SERVICE);         StorageVolume[] ExternalVolumeList = storageManager.getVolumeList();         for (StorageVolume storageVolume : ExternalVolumeList) {             String path = storageVolume.getPath();@@ -204,6 +220,18 @@ public class MediaScannerReceiver extends BroadcastReceiver         }         return true;     }+/*[email protected] modify SDCard to default storage 20170818*/+    private StorageVolume[] getDefaultWriteDiskList() {+        List storageVolumes = new ArrayList();+        StorageVolume[] volumes = storageManager.getVolumeList();+        for (StorageVolume volume : volumes) {+            if (Environment.MEDIA_MOUNTED.equals(storageManager.getVolumeState(volume.getPath()))) {+                storageVolumes.add(volume);+            }+        }+        return storageVolumes.toArray(new StorageVolume[storageVolumes.size()]);+    }+/*End of by gxk*/     /// M: get main handler to do check whether all storage have been mounted every CHECK_INTERVAL time.     private Handler getHandler() {@@ -221,6 +249,20 @@ public class MediaScannerReceiver extends BroadcastReceiver                             scan(context, MediaProvider.EXTERNAL_VOLUME);                             removeCallbacksAndMessages(null);                             sHandler = null;+/*[email protected] modify SDCard to default storage 20170818*/+                            if (FeatureOption.PRJ_FEATURE_REVO_B_SET_DEFAULT_STORAGE &&+                                 isUserSet == 0 && isAllStorageMounted(context)) {+                                StorageVolume[] availableVolumes = getDefaultWriteDiskList();+                                for (StorageVolume volume : availableVolumes) {+                                    String path = volume.getPath();+                                    MtkLog.v(TAG, " setDefaultPath = " + path);+                                    if (path != null && !"/storage/emulated/0".equals(path)) {+                                        StorageManagerEx.setDefaultPath(path);+                                        break;+                                    }+                                }+                            }+/*End of by gxk*/                         } else {                             MtkLog.v(TAG, "Some storage has not been mounted, wait it mounted until time out.");                             Message next = obtainMessage(msg.what, waitTime + CHECK_INTERVAL, -1, msg.obj);

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