Android-新增資料檔案

新增檔案

public class MainActivity extends Activity {

    private TextView textView;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        textView = (TextView) findViewById(R.id.textView1);
        
        File div = new File(Environment.getExternalStorageDirectory(),
                "MyTestFile/Hello");
        
        if (!div.exists()) {
            div.mkdirs();
            textView.setText("檔案已新增");
        } 
        else
        {
            textView.setText("檔案已存在");
        }
        
    }
}

記得一定要新增權限

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

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