我怎樣才能安裝SD卡編程？

Question

我想安裝SD卡編程，我該如何檢查？

Answer 1

如果您正在編寫普通的SDK應用程序，則無法自行安裝SD卡。

如果您爲設備製造商工作，或者您正在構建可以使用固件簽名密鑰簽名的應用程序，則可以使用USB_MASS_STORAGE_ENABLED。

Answer 2

爲了使其運作的，你需要添加用戶庫classes-full-debug.jar（從AOSP或釐米編譯）BEFOREandroid.jar（有在構建路徑面板罐子排序）或StorageManager不會解決registerListener() 你還需要android.permission.MOUNT_UNMOUNT_FILESYSTEMS

package x.y.z; 

import android.app.Activity; 
import android.content.Context; 
import android.os.Bundle; 
import android.os.Environment; 
import android.os.IBinder; 
import android.os.RemoteException; 
import android.os.storage.IMountService; 
import android.os.storage.StorageEventListener; 
import android.os.storage.StorageManager; 
import android.os.ServiceManager; 
import android.widget.TextView; 

public class MyActivity extends Activity 
{ 
    private static final String MOUNTPOINT = "/mnt/sdcard"; 
    private IMountService mMountService; 
    private StorageManager mStorageManager; 
    private TextView mText; 

    private final StorageEventListener mStorageListener = new StorageEventListener() 
    { 
     @Override 
     public void onStorageStateChanged(String path, String oldState, String newState) 
     { 
      String text = mText.getText() + "\n"; 
      text += "state changed notification that " + path + " changed state from " + oldState + " to " + newState; 
      mText.setText(text); 
     } 
    }; 

    @Override 
    public void onCreate(Bundle savedInstanceState) 
    { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     mText = (TextView) findViewById(R.id.textView); 

     if (mMountService == null) 
     { 
      IBinder service = ServiceManager.getService("mount"); 
      mMountService = IMountService.Stub.asInterface(service); 
     } 

     if (mStorageManager == null) 
     { 
      mStorageManager = (StorageManager) getSystemService(Context.STORAGE_SERVICE); 
      mStorageManager.registerListener(mStorageListener);   
     } 

     try 
     { 
      String state = mMountService.getVolumeState(MOUNTPOINT); 
      mText.setText("Media state " + state); 
      if (state.equals(Environment.MEDIA_MOUNTED)) 
       mMountService.unmountVolume(MOUNTPOINT, false); 
      else if (state.equals(Environment.MEDIA_UNMOUNTED)) 
       mMountService.mountVolume(MOUNTPOINT); 
     } catch (RemoteException e) 
     { 
      e.printStackTrace(); 
     } 
    } 

    @Override 
    protected void onDestroy() 
    { 
     if (mStorageManager != null && mStorageListener != null) 
      mStorageManager.unregisterListener(mStorageListener); 
     super.onDestroy(); 
    } 
}