挖穿Android第五十一天

来电监听

创建后台服务 AddressService
public void onCreate() {
 listener = new MyPhoneListener();
 tm = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
 tm.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);
};
@Override
public void onDestroy() {
 super.onDestroy();
 tm.listen(listener, PhoneStateListener.LISTEN_NONE);
 listener = null;
}
class MyPhoneListener extends PhoneStateListener {
 @Override
 public void onCallStateChanged(int state, String incomingNumber) {
 switch (state) {
 case TelephonyManager.CALL_STATE_RINGING:
 String address = NumberAddressDao.getAddress(incomingNumber);
 Toast.makeText(AddressService.this, address, Toast.LENGTH_LONG)
 .show();
 break;
 default:
 break;
 }
 super.onCallStateChanged(state, incomingNumber);
 }
}
设置页面新增勾选框,点击后启动或停止service

判断服务是否在后台运行,更新checkbox

public static boolean isServiceRunning(String serviceName, Context ctx) {
 ActivityManager am = (ActivityManager) ctx
 .getSystemService(Context.ACTIVITY_SERVICE);
 List runningServices = am.getRunningServices(100);//获取所有后台运行的服务
 for (RunningServiceInfo runningServiceInfo : runningServices) {
 String className = runningServiceInfo.service.getClassName();
 if (className.equals(serviceName)) {
 return true;
 }
 }
 return false;
}

去电监听

• 静态注册广播

 
 
 
 

注意添加权限: 
问题: 当开关关闭时,仍然能显示去电地址信息

• 动态注册广播
• 当启动后台服务时,注册广播,服务停止后,注销广播,这样的话,来电和去电的位置显示都可以由一个开关来控制

自定义Toast

• Toast原理分析

查找transient_notification文件,查看布局样式, 在values/themes中搜索toastFrameBackground, 查看背景图片toast_frame.9.png
分析Toast源码, 创建自定义Toast
private void showToast(String address) {
 view = new TextView(this);
 view.setText(address);
 view.setTextColor(Color.RED);
 final WindowManager.LayoutParams params = new WindowManager.LayoutParams();
 params.height = WindowManager.LayoutParams.WRAP_CONTENT;
 params.width = WindowManager.LayoutParams.WRAP_CONTENT;
 params.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
 | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE
 | WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
 params.format = PixelFormat.TRANSLUCENT;
 params.type = WindowManager.LayoutParams.TYPE_TOAST;
 params.setTitle("Toast");
 wm.addView(view, params);
}
监听电话状态, 如果电话处于空闲状态,就从WindowManager中删除View
case TelephonyManager.CALL_STATE_IDLE:
 if (wm != null && view != null) {
 wm.removeView(view);
 }
break;
 

自定义Toast样式

1. 布局文件
 电话图标: @android:drawable/ic_menu_call
2. 自定义SettingClickView, 类似SettingItemView
 去掉自定义属性,保留setDesc和setTitle两个方法
3. 初始化SettingClickView, 设置点击事件,弹出单选Dialog
 // 选择归属地样式的弹窗
 AlertDialog.Builder builder = new AlertDialog.Builder(
 SettingActivity.this);
 int style = sp.getInt("address_style", 0);
 builder.setSingleChoiceItems(items, style,
 new DialogInterface.OnClickListener() {
 @Override
 public void onClick(DialogInterface dialog,
 int which) {
 sp.edit().putInt("address_style", which)
 .commit();
 scvStyle.setDesc(items[which]);
 dialog.dismiss();
 }
 });
 builder.setNegativeButton("取消", null);
 builder.show();
4. 选择相应样式,保存在sp中
5. 从sp中读取样式,在AddressService中更改背景图片
 SharedPreferences sp = getSharedPreferences("config", MODE_PRIVATE);
 int style = sp.getInt("address_style", 0);
 int[] bgs = new int[] { R.drawable.call_locate_white,
 R.drawable.call_locate_orange, R.drawable.call_locate_blue,
 R.drawable.call_locate_gray, R.drawable.call_locate_green };
 view.setBackgroundResource(bgs[style]);

修改归属地显示位置

定义DragViewActivity
1. 布局文件:
 
 
 
 
 
2. 拖拽事件监听
 ivDrag.setOnTouchListener(new OnTouchListener() {
 @Override
 public boolean onTouch(View v, MotionEvent event) {
 switch (event.getAction()) {
 case MotionEvent.ACTION_DOWN:
 //获取起始点坐标
 startX = (int) event.getRawX();
 startY = (int) event.getRawY();
 break;
 case MotionEvent.ACTION_MOVE:
 int endX = (int) event.getRawX();
 int endY = (int) event.getRawY();
 int dx = endX - startX;
 int dy = endY - startY;
 System.out.println("位置偏移:(" + dx + "," + dy + ")");
 //根据手指的移动偏移量,计算出图片相应的位置
 int left = ivDrag.getLeft() + dx;
 int top = ivDrag.getTop() + dy;
 int right = ivDrag.getRight() + dx;
 int bottom = ivDrag.getBottom() + dy;
 //判断图片是否移出屏幕
 if (left < 0 || right > windowWidth || top < 0
 || bottom > windowHeight - 20) {
 break;
 }
 //判断图片位于屏幕上半部分还是下半部分
 if (top > windowHeight / 2) {
 tvBottom.setVisibility(View.INVISIBLE);
 tvTop.setVisibility(View.VISIBLE);
 } else {
 tvBottom.setVisibility(View.VISIBLE);
 tvTop.setVisibility(View.INVISIBLE);
 }
 //重新设定图片的位置
 ivDrag.layout(left, top, right, bottom);
 //重新获取起始点坐标
 startX = (int) event.getRawX();
 startY = (int) event.getRawY();
 break;
 case MotionEvent.ACTION_UP:
 //记录拖拽结束后的坐标点
 Editor edit = sp.edit();
 edit.putInt("lastX", ivDrag.getLeft());
 edit.putInt("lastY", ivDrag.getTop());
 edit.commit();
 break;
 default:
 break;
 }
 return true;
 }
 });
 -----------------
 获取屏幕宽高
 WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
 final int windowWidth = wm.getDefaultDisplay().getWidth();
 final int windowHeight = wm.getDefaultDisplay().getHeight();
3. 初始化图片位置
 LayoutParams params = (LayoutParams) ivDrag.getLayoutParams();
 params.leftMargin = lastX;
 params.topMargin = lastY;
 ivDrag.setLayoutParams(params);
 if (lastY > windowHeight / 2) {
 tvBottom.setVisibility(View.INVISIBLE);
 tvTop.setVisibility(View.VISIBLE);
 } else {
 tvBottom.setVisibility(View.VISIBLE);
 tvTop.setVisibility(View.INVISIBLE);
 }
 注意:此处不能使用该方法: ivDrag.layout(lastX, lastY, lastX + ivDrag.getWidth(), lastY + ivDrag.getHeight());
 因为当前还没有测量好, 所以不能直接调用layout. 顺序是measure,layout,ondraw

使用WindowManager设置归属地位置

int lastX = sp.getInt("lastX", 0);
int lastY = sp.getInt("lastY", 0);
params.gravity = Gravity.TOP + Gravity.LEFT; //注意要将重心设置在左上方,默认位于屏幕中央
params.x = lastX;
params.y = lastY;

半透明效果处理

1. 清单文件中增加样式, 将Activity设置为全透明
 
2. 将根布局的背景设置为半透明颜色

双击事件

public void onClick(View view) {
 if (firstClickTime > 0) {
 if (System.currentTimeMillis() - firstClickTime < 500) {
 System.out.println("双击");
 firstClickTime = 0;
 return;
 }
 }
 firstClickTime = System.currentTimeMillis();
}

多击事件

设置->关于手机->"Android 版本",多次点击后会跳转页面
查看系统源码Settings, 搜索"Android 版本"字符串,查找相关代码,拷贝到自己的项目中
long[] mHits = new long[3];//数组长度为点击次数
public void onClick(View view) {
 // src 源数组
 // srcPos 开始拷贝的位置
 // dst 目标数组
 // dstPos 目标数组的起始拷贝位置
 // length 拷贝的数组长度
 System.arraycopy(mHits, 1, mHits, 0, mHits.length - 1);//拷贝数组
 mHits[mHits.length - 1] = SystemClock.uptimeMillis();
 if (mHits[0] >= (SystemClock.uptimeMillis() - 500)) {
 System.out.println("是男人!!!");
 mHits = new long[3];
 }
}

双击居中

//图片设置为屏幕居中
ivDrag.layout(windowWidth / 2 - ivDrag.getWidth() / 2,
 ivDrag.getTop(),
 windowWidth / 2 + ivDrag.getWidth() / 2,
 ivDrag.getBottom());
//在sp中记录位置
Editor edit = sp.edit();
edit.putInt("lastX", ivDrag.getLeft());
edit.putInt("lastY", ivDrag.getTop());
edit.commit();
注意: 为了能响应点击事件,需要在onTouch中返回false,将事件传递给onClick

窗体触摸移动

1. 为了获取触摸事件,首先需要去掉WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE
2. 其次设置params.type = WindowManager.LayoutParams.TYPE_Phone;
3. 增加权限 
4. 移动逻辑处理
 case MotionEvent.ACTION_MOVE:
 int dx = (int) (event.getRawX() - startX);
 int dy = (int) (event.getRawY() - startY);
 params.x += dx;
 params.y += dy;
 //控制图片不要超出屏幕边界
 if (params.x < 0) {
 params.x = 0;
 }
 //控制图片不要超出屏幕边界
 if (params.y < 0) {
 params.y = 0;
 }
 //控制图片不要超出屏幕边界
 if (params.x > wm.getDefaultDisplay().getWidth()
 - view.getWidth()) {
 params.x = wm.getDefaultDisplay().getWidth()
 - view.getWidth();
 }
 //控制图片不要超出屏幕边界
 if (params.y > wm.getDefaultDisplay().getHeight()
 - view.getHeight()) {
 params.y = wm.getDefaultDisplay().getHeight()
 - view.getHeight();
 }
 System.out.println("当前位置:" + params.x + ";" + params.y);
 wm.updateViewLayout(view, params);//更新图片的显示位置
 startX = (int) event.getRawX();
 startY = (int) event.getRawY();
 break;