安卓手勢-為什麼我滑屏時不顯示默認的Toast呢

為什麼我滑屏時不顯示"默認的Toast"呢

public class MainActivity extends Activity implements OnGestureListener {

@Override
public boolean onDown(MotionEvent e) {
    // TODO Auto-generated method stub
    return false;
}

@Override
public void onShowPress(MotionEvent e) {
    // TODO Auto-generated method stub

}

@Override
public boolean onSingleTapUp(MotionEvent e) {
    // TODO Auto-generated method stub
    return false;
}

@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
    // TODO Auto-generated method stub
    return false;
}

@Override
public void onLongPress(MotionEvent e) {
    // TODO Auto-generated method stub

}

@SuppressLint("ShowToast")
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
    if(velocityX < 0){ 
     Toast toast=Toast.makeText(getApplicationContext(), "默認的Toast", Toast.LENGTH_SHORT); }
    if(velocityX > 0){ 
         Toast toast=Toast.makeText(getApplicationContext(), "默認的Toast", Toast.LENGTH_SHORT); }
    if(velocityY < 0){ 
         Toast toast=Toast.makeText(getApplicationContext(), "默認的Toast", Toast.LENGTH_SHORT); }
    if(velocityY > 0){ 
         Toast toast=Toast.makeText(getApplicationContext(), "默認的Toast", Toast.LENGTH_SHORT); }
    return false;
}



}  

最佳回答：

。。因為你只是初始化那個Toast，沒有調用show方法，正確應該是：
Toast.makeText(getApplicationContext(), "默認的Toast", Toast.LENGTH_SHORT).show();