Environment.getExternalStorageState（）在虛擬設備上返回false

Question

我試圖檢查外部存儲是否可用，或者甚至我認爲我做了所有正確的事情，但仍然說存儲不可用。

private String state; 
    protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
     setContentView(R.layout.externaldata); 
     eWrite = (TextView) findViewById(R.id.tveWrite); 
     eRead = (TextView) findViewById(R.id.tveRead); 
     enviromentState = Environment.getExternalStorageState();   
if (enviromentState.equals(Environment.MEDIA_MOUNTED)) { 
        // read and write 
        eWrite.setText("you can write"); 
        eRead.setText("you can read"); 
       } else if (enviromentState.equals(Environment.MEDIA_MOUNTED_READ_ONLY)) { 
        // read but cant write 
        eWrite.setText("you cannot write "); 
        eRead.setText("but you can read"); 
       } else { 
        eWrite.setText("you cannot write"); 
        eRead.setText("you canot read"); 
       } 
    } 

，我也AndroidManifest.xml中

給權限

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> 
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> 

我在這裏的虛擬設備的屏幕截圖。

Answer 1

我通過擴大SD卡大小151mb