當不知道哪錯了，使用 Log(String ,String,Exception)可以追棧查錯

當不知道哪錯了，使用 Log(String ,String,Exception)

public class MainActivity extends Activity implements OnClickListener {
	private Button btn;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		btn=(Button) findViewById(R.id.btn);
		
		btn.setOnClickListener(this);
		
	}
	@Override
	public void onClick(View v) {
		doSomething();
		
	}

	
	public void doSomething(){
		Toast.makeText(this, "xixixi", Toast.LENGTH_SHORT);
		Log.d("xxx", "hhhhh", new Exception());
	}
	
}