关于 获取 Android 本地手机 号码

该方法无法获取 某些号码（Android 4.0以后google正在慢慢收回一些权限）

public class MainActivity extends Activity {
	// private String TAG = "MainActivity";
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		TelephonyManager tm = (TelephonyManager) this
				.getSystemService(TELEPHONY_SERVICE);
		String phoneId = tm.getLine1Number();
		TextView tv = (TextView) findViewById(R.id.num);
		tv.setText(phoneId);
		Log.e("phoneId： ", phoneId + "");
	}
}