5.基本控件 Button 事件处理 点击 长按 触摸

public class MainActivity extends AppCompatActivity {

    private final String zouhao = "啊啊啊啊啊: ";

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

        Button but2 = findViewById(R.id.but2);

        //点击事件
        but2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Log.e(zouhao,"onClick");
                Toast.makeText(getApplicationContext(),"onClick",Toast.LENGTH_SHORT).show();
            }
        });

        //长按事件
        but2.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View view) {
                Log.e(zouhao,"onLongClick");
                Toast.makeText(getApplicationContext(),"onLongClick",Toast.LENGTH_SHORT).show();
                return false;
            }
        });

        //触摸事件
        but2.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
                Log.e(zouhao,"setOnTouchListener");
                Toast.makeText(getApplicationContext(),"setOnTouchListener",Toast.LENGTH_SHORT).show();
                return false;
            }
        });

    }

    public void papapa(View view) {
        Toast.makeText(getApplicationContext(),"自定义onclick",Toast.LENGTH_SHORT).show();
    }
}

   <Button
      android:id="@+id/but2"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"/>

   <Button
       android:id="@+id/but3"
       android:onClick="papapa"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"/>