android开发： 我有一个LinearLayout要监听左滑和右滑给点示例代码 别给我自定义view的代码!

你可以使用GestureDetector来监听左滑和右滑动作。以下是一个示例代码：

import android.support.v4.view.GestureDetectorCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.widget.LinearLayout;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements GestureDetector.OnGestureListener {

    private GestureDetectorCompat gestureDetector;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        LinearLayout linearLayout = findViewById(R.id.linearLayout);
        gestureDetector = new GestureDetectorCompat(this, this);

        linearLayout.setOnTouchListener(new LinearLayout.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                gestureDetector.onTouchEvent(event);
                return true;
            }
        });
    }

    @Override
    public boolean onDown(MotionEvent e) {
        return false;
    }

    @Override
    public void onShowPress(MotionEvent e) {

    }

    @Override
    public boolean onSingleTapUp(MotionEvent e) {
        return false;
    }

    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
        if (e1.getX() > e2.getX()) {
            Toast.makeText(this, "左滑", Toast.LENGTH_SHORT).show();
        } else if (e1.getX() < e2.getX()) {
            Toast.makeText(this, "右滑", Toast.LENGTH_SHORT).show();
        }
        return true;
    }

    @Override
    public void onLongPress(MotionEvent e) {

    }

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
        return false;
    }
}

在这个示例中，我们在LinearLayout的触摸事件中使用GestureDetector来处理手势。在onScroll方法中，我们检测到e1.getX()大于e2.getX()时，说明发生了左滑动作，反之则是右滑动作。你可以根据你的需求在这两个条件中执行相应的操作