从视图移动到视图时动作动作，而不会将手指从屏幕上抬起

Question

这是关于同一主题的第三个问题。我正在为盲人为客户制作一个电话拨号应用，我希望无需手指抬起屏幕就可以从按钮移动到按钮，并在手指停止时播放该号码的声音在按钮上，如果他想让那个按钮输入，他就会离开他的手指等等我在上一个问题中找到了这个代码，只有当手指在移动时它才有效但是如果我抬起手指我就无法发生任何事情，所以我的问题是当我从按钮上抬起手指时如何获得动作如何单独处理每个按钮？

package com.example.touch;

import android.app.Activity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.TextView;

public class MainActivity extends Activity {

    MyButton b1, b2, b3, b4;

    int b1x1, b1x2, b1y1, b1y2;

    private TextView xcordview;
    private TextView ycordview;
    private TextView buttonIndicator;
    private RelativeLayout touchview;
    private static int defaultStates[];
    private Button mLastButton;
    private final static int[] STATE_PRESSED = {
            android.R.attr.state_pressed,
            android.R.attr.state_focused  
                    | android.R.attr.state_enabled };

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        xcordview = (TextView) findViewById(R.id.textView4);
        ycordview = (TextView) findViewById(R.id.textView3);
        buttonIndicator = (TextView) findViewById(R.id.button_indicator);
        touchview = (RelativeLayout) findViewById(R.id.relativelayout);

        b1 = (MyButton) findViewById(R.id.button1);
        b2 = (MyButton) findViewById(R.id.button2);
        b3 = (MyButton) findViewById(R.id.button3);
        b4 = (MyButton) findViewById(R.id.button4);
        defaultStates = b1.getBackground().getState();

    }

    @Override
    protected void onResume() {
        // TODO Auto-generated method stub
        super.onResume();

        touchview.setOnTouchListener(new View.OnTouchListener() {

            private boolean isInside = false;

            @Override
            public boolean onTouch(View v, MotionEvent event) {

                int x = (int) event.getX();
                int y = (int) event.getY();

                xcordview.setText(String.valueOf(x));
                ycordview.setText(String.valueOf(y));

                for (int i = 0; i < touchview.getChildCount(); i++) {
                    View current = touchview.getChildAt(i);
                    if (current instanceof Button) {
                        Button b = (Button) current;

                        if (!isPointWithin(x, y, b.getLeft(), b.getRight(), b.getTop(),
                                b.getBottom())) {
                            b.getBackground().setState(defaultStates);
                            b.getBackground().setAlpha(255);
                        }

                        if (isPointWithin(x, y, b.getLeft(), b.getRight(), b.getTop(),
                                b.getBottom())) {
                            b.getBackground().setState(STATE_PRESSED);
                            b.getBackground().setAlpha(150);
                            b.performClick();

                            if (b != mLastButton) {
                                mLastButton = b;
                                buttonIndicator.setText(mLastButton.getText());
                            }
                        }

                    }
                }
                return true;
            }

        });

    }

    @Override
    public void onWindowFocusChanged(boolean hasFocus) {
        // TODO Auto-generated method stub
        super.onWindowFocusChanged(hasFocus);
    }

    static boolean isPointWithin(int x, int y, int x1, int x2, int y1, int y2) {
        return (x <= x2 && x >= x1 && y <= y2 && y >= y1);
    }
}