从一个视图移动到另一个视图时，无需将手指从屏幕上抬起，java动作将向上

Question

这是我关于同一主题的第三个问题。我正在为一个客户制作一个手机拨号器应用程序，用于盲人，我想从一个按钮移动到另一个按钮，而不需要手指抬起屏幕，当手指停在按钮上时播放数字的声音，如果他想让按钮被键入，他就离开了手指，依此类推，我在前面的问题中找到了这段代码，它可以工作只有手指在移动，但如果我抬起手指，我就什么也做不到，所以我的问题是，当我从按钮上抬起手指时，如何采取行动，以及如何单独处理每个按钮

package com.example.touch;

import 安卓.app.Activity;
import 安卓.os.Bundle;
import 安卓.view.MotionEvent;
import 安卓.view.View;
import 安卓.widget.Button;
import 安卓.widget.RelativeLayout;
import 安卓.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 = {
            安卓.R.attr.state_pressed,
            安卓.R.attr.state_focused  
                    | 安卓.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);
    }
}