仿iPhone assistivetouch小工具实现详解1

今天我们接着昨天的继续

1、实现控制球的点击拖动

2、点击控制球后弹出菜单选择界面

3、菜单选择功能

其实这几个都不难，思路如下：

1、要实现我们的控制球悬浮在所有App界面之上：通过WindowManager来设置App的显示方式

2、控制球的拖动：重写onTouchListener即可，这个相信很多人都做过了

3、弹出菜单界面和菜单选择功能：这个就是一个比较好看的PopupWindow

通过这几条分析，我们可以发现，这个项目其实还是比较简单的哈，所以说，我一直坚信的，思路很重要

下面我们一点点来实现吧：so easy

程序核心必然是一个Service，相信我不要多说了：

MainService：

package com.xys.xtouchassistant.service;import com.xys.xtouchassistant.R;import android.app.Service;import android.content.Context;import android.content.Intent;import android.graphics.Color;import android.graphics.PixelFormat;import android.graphics.drawable.ColorDrawable;import android.graphics.drawable.Drawable;import android.os.IBinder;import android.provider.Settings;import android.util.DisplayMetrics;import android.view.Gravity;import android.view.LayoutInflater;import android.view.MotionEvent;import android.view.View;import android.view.View.OnClickListener;import android.view.View.OnTouchListener;import android.view.WindowManager;import android.widget.Button;import android.widget.PopupWindow;import android.widget.TextView;import android.widget.Toast;public class MainService extends Service implements OnClickListener, OnTouchListener {    // 控制球View    private View touchBallView;    // 弹出菜单View    private View menuView;    // 控制球    private Button touchBall;    // WindowManager    WindowManager wm;    // WindowManagerParams    WindowManager.LayoutParams params;    private PopupWindow popup;    // 点击坐标    private float x, y;    private float touchX, touchY;    // 移动Flag    private boolean isMoving;    // Menu上的组件    private TextView tvApps;    private TextView tvHomeScreen;    private TextView tvSetting;    private TextView tvLockScreen;    private TextView tvFavor;    @Override    public void onCreate() {super.onCreate();// 初始化ViewsinitView();// 显示TouchBallcreateTouchBallView();// 监听事件regListener();    }    /**     * 监听事件     */    private void regListener() {touchBall.setOnTouchListener(this);touchBall.setOnClickListener(this);tvApps.setOnClickListener(this);tvHomeScreen.setOnClickListener(this);tvSetting.setOnClickListener(this);tvLockScreen.setOnClickListener(this);tvFavor.setOnClickListener(this);    }    /**     * 初始化Views     */    private void initView() {// 加载控制球ViewtouchBallView = LayoutInflater.from(this).inflate(R.layout.touch_ball, null);touchBall = (Button) touchBallView.findViewById(R.id.touch_ball);// 初始化MenuViewmenuView = LayoutInflater.from(this).inflate(R.layout.shown_menu, null);tvApps = (TextView) menuView.findViewById(R.id.tv_apps);tvHomeScreen = (TextView) menuView.findViewById(R.id.tv_home_screen);tvSetting = (TextView) menuView.findViewById(R.id.tv_setting);tvLockScreen = (TextView) menuView.findViewById(R.id.tv_lock_screen);tvFavor = (TextView) menuView.findViewById(R.id.tv_favor);    }    /**     * 显示TouchBall     */    private void createTouchBallView() {wm = (WindowManager) getSystemService(Context.WINDOW_SERVICE);params = new WindowManager.LayoutParams();params.type = WindowManager.LayoutParams.TYPE_PHONE;params.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;params.gravity = Gravity.LEFT | Gravity.TOP;params.x = 0;params.y = 0;params.width = WindowManager.LayoutParams.WRAP_CONTENT;params.height = WindowManager.LayoutParams.WRAP_CONTENT;params.format = PixelFormat.RGBA_8888;wm.addView(touchBallView, params);    }    @Override    public IBinder onBind(Intent intent) {return null;    }    @Override    public void onClick(View v) {switch (v.getId()) {case R.id.touch_ball:    // 显示Popup菜单    showMenuWindow();    break;case R.id.tv_apps:    // 显示Apps菜单    Toast.makeText(this, "APPS", Toast.LENGTH_SHORT).show();    popup.dismiss();    break;case R.id.tv_favor:    Toast.makeText(this, "FAVOR", Toast.LENGTH_SHORT).show();    popup.dismiss();    break;case R.id.tv_home_screen:    // 显示主菜单    Toast.makeText(this, "HOME", Toast.LENGTH_SHORT).show();    popup.dismiss();    break;case R.id.tv_lock_screen:    // 锁屏    Toast.makeText(this, "LOCK", Toast.LENGTH_SHORT).show();    popup.dismiss();    break;case R.id.tv_setting:    // 显示Setting界面    Toast.makeText(this, "SETTING", Toast.LENGTH_SHORT).show();    popup.dismiss();    break;default:    popup.dismiss();    break;}    }    /**     * 显示Popup菜单     */    private void showMenuWindow() {DisplayMetrics dm = getResources().getDisplayMetrics();popup = new PopupWindow(menuView, (int) (dm.widthPixels * 0.7), (int) (dm.heightPixels * 0.5));Drawable transpent = new ColorDrawable(Color.TRANSPARENT);popup.setBackgroundDrawable(transpent);popup.setFocusable(true);popup.setOutsideTouchable(true);popup.showAtLocation(touchBallView, Gravity.CENTER, 0, 0);popup.update();    }    /**     * Touch监听事件     */    @Override    public boolean onTouch(View v, MotionEvent event) {x = event.getRawX();y = event.getRawY();// 触摸事件switch (event.getAction()) {case MotionEvent.ACTION_DOWN:    isMoving = false;    // 触摸坐标赋值    touchX = event.getX();    touchY = event.getY();    break;case MotionEvent.ACTION_MOVE:    isMoving = true;    // 触摸坐标赋值    params.x = (int) (x - touchX);    params.y = (int) (y - touchY);    wm.updateViewLayout(touchBallView, params);    break;case MotionEvent.ACTION_UP:    // 触摸坐标赋值    touchX = touchY = 0;    break;default:    break;}if (isMoving) {    return true;} else {    return false;}    }}

开启Service的主程序：

MainActivity：

package com.xys.xtouchassistant.activity;import com.xys.xtouchassistant.R;import com.xys.xtouchassistant.service.MainService;import android.os.Bundle;import android.app.Activity;import android.content.Intent;public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);Intent service = new Intent();service.setClass(this, MainService.class);startService(service);    }}

这里只是简单的用一个Activity去开启这个服务，后面我们会重新实现开启服务的方法：

1、通过注册一个开机广播事件去开启我们的服务

2、通过进程守护来实现我们的Service不被kill（也可以通过在通知面板显式显示服务的方式来防止被kill）

3、实现菜单界面功能的可配置化

ps：需要源码的请留意哦