Android懸浮框，在Service中開啟懸浮窗；在Service中開啟Dialog；
阿新 • • 發佈：2018-11-29
文章介紹瞭如何在Service中顯示懸浮框，在Service中彈出Dialog，在Service中做耗時的輪詢操作；
背景需求：
公司的專案現在的邏輯是這樣的：傳送一個指令，然後3秒一次輪詢去查詢這個指令是否成功，在這期間介面有遮蓋不可操作；
然後需求改了，因為遮蓋介面不讓使用者操作體驗不好；現在的需求是：這個輪詢查詢指令是否成功的操作在後端進行，介面有一個懸浮框用來提示使用者正在查詢指令；
嗯，在後端查詢指令讓使用者無感，可以用Service實現，然後懸浮框使用WindowMessage實現，輪詢查詢指令使用Handler或IntentService實現；大致就是這樣，先來個Demo；
1、開啟服務：需要的資訊由Activity使用Intent傳遞給Service；
Intent intent = new Intent(this,MyService.class);
intent.putExtra("args","晨");
startService(intent);public class MyService extends Service { public MyService() { } @Override public IBinder onBind(Intent intent) { throw new UnsupportedOperationException("Not yet implemented"); } @Override public void onCreate() { super.onCreate(); } @Override public int onStartCommand(Intent intent, int flags, int startId) { args = intent.getStringExtra("args"); return super.onStartCommand(intent, flags, startId); } @Override public void onDestroy() { super.onDestroy(); } }
Service中的onCreate只在建立的時候執行一次，onStartCommand()每次開啟這個Service都會執行；同時別忘記這個註冊：
<service
android:name=".MyService"
android:enabled="true"
android:exported="true" />2、在Service開啟成功後建立懸浮框，
@Override public int onStartCommand(Intent intent, int flags, int startId) { args = intent.getStringExtra("args"); initView(); return super.onStartCommand(intent, flags, startId); } /** * 使用系統級別的WindowManager展示懸浮框，需要6.0以上的許可權； */ private void initView() { if (Build.VERSION.SDK_INT >= 23) { if (!Settings.canDrawOverlays(this)) { Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); intent.setData(Uri.parse( "package:"+"com.example.administrator.xuanfudemo")); //應用的包名，可直接跳轉到這個應用的懸浮窗設定； startActivity(intent); } else { openWindow(); } }else { openWindow(); } } private void openWindow(){ windowManager = (WindowManager) this.getSystemService(WINDOW_SERVICE); WindowManager.LayoutParams layoutParams = new WindowManager.LayoutParams(); layoutParams.height = ViewGroup.LayoutParams.WRAP_CONTENT; layoutParams.width = ViewGroup.LayoutParams.WRAP_CONTENT; layoutParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT; // layoutParams.type = WindowManager.LayoutParams.TYPE_APPLICATION_ATTACHED_DIALOG; // layoutParams.token = this.getWindow().getDecorView().getWindowToken(); //這樣設定，在activity中開啟懸浮框可繞過許可權； layoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL; layoutParams.format = PixelFormat.TRANSLUCENT; //透明 layoutParams.gravity = Gravity.TOP | Gravity.RIGHT; //右上角顯示 view = LayoutInflater.from(this).inflate(R.layout.view_win,null); windowManager.addView(view,layoutParams); }
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />懸浮框需要許可權，而且這個許可權屬於危險級許可權，API23以上需要使用者手動開啟；
3、使用Handler輪詢查詢指令；
查詢到指令後彈框提示，彈出Dialog。在Service中彈出Dialog需要設定下方程式碼，同時還要有彈窗許可權；
dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT); private Handler mHandler = new Handler(){
@Override
public void dispatchMessage(Message msg) {
super.dispatchMessage(msg);
switch (msg.what){
case HANDLERSIGN:
Log.i(TAG, "dispatchMessage: "+args+(++num));
mHandler.sendEmptyMessageDelayed(HANDLERSIGN,HANDLERTIME);
if (num == 5){
AlertDialog.Builder builder = new AlertDialog.Builder(MyService.this);
builder.setPositiveButton("確定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
MyService.this.stopSelf();
}
});
AlertDialog dialog = builder.create();
dialog.setMessage("我的計數"+num);
dialog.setTitle("提示");
dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
dialog.show();
}
break;
}
}
};
private final String TAG = "ccb";
private String args;
private int num;
private final int HANDLERSIGN = 10;
private final int HANDLERTIME = 2010;
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
args = intent.getStringExtra("args");
initView();
initData();
return super.onStartCommand(intent, flags, startId);
}
private void initData() {
mHandler.sendEmptyMessageDelayed(HANDLERSIGN,HANDLERTIME);
}4、在服務銷燬時，清空Handler資訊關閉懸浮框；
@Override
public void onDestroy() {
super.onDestroy();
Log.i(TAG, "onDestroy: 啊，ByKill");
mHandler.removeCallbacksAndMessages(null);
if (windowManager != null) windowManager.removeView(view);
}全部的Service程式碼：
懸浮框我使用了兩種，另外一種是FloatWindow，有興趣的可以去GitHub查一下；
package com.example.administrator.xuanfudemo;
import android.Manifest;
import android.app.AlertDialog;
import android.app.Service;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.PixelFormat;
import android.net.Uri;
import android.os.Build;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.provider.Settings;
import android.support.v4.app.ActivityCompat;
import android.util.Log;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import com.yhao.floatwindow.FloatWindow;
import com.yhao.floatwindow.PermissionListener;
import com.yhao.floatwindow.Screen;
import com.yhao.floatwindow.ViewStateListener;
public class MyService extends Service {
private WindowManager windowManager;
private View view;
public MyService() {
}
@Override
public IBinder onBind(Intent intent) {
throw new UnsupportedOperationException("Not yet implemented");
}
@Override
public void onCreate() {
super.onCreate();
}
private Handler mHandler = new Handler(){
@Override
public void dispatchMessage(Message msg) {
super.dispatchMessage(msg);
switch (msg.what){
case HANDLERSIGN:
Log.i(TAG, "dispatchMessage: "+args+(++num));
mHandler.sendEmptyMessageDelayed(HANDLERSIGN,HANDLERTIME);
if (num == 5){
AlertDialog.Builder builder = new AlertDialog.Builder(MyService.this);
builder.setPositiveButton("確定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
MyService.this.stopSelf();
// if (windowManager != null) windowManager.removeView(view);
}
});
AlertDialog dialog = builder.create();
dialog.setMessage("我的計數"+num);
dialog.setTitle("提示");
dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
dialog.show();
}
break;
}
}
};
private final String TAG = "ccb";
private String args;
private int num;
private final int HANDLERSIGN = 10;
private final int HANDLERTIME = 2010;
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
args = intent.getStringExtra("args");
// initView();
initView2();
initData();
return super.onStartCommand(intent, flags, startId);
}
/**
* FloatWindow使用FloatWindow庫展示懸浮框；可拖拽
*/
private void initView2() {
FloatWindow
.with(getApplicationContext())
.setView(LayoutInflater.from(this).inflate(R.layout.view_win,null))
.setWidth(100) //設定控制元件寬高
.setHeight(Screen.height,0.2f)
.setX(100) //設定控制元件初始位置
.setY(Screen.height,0.3f)
.setDesktopShow(true) //桌面顯示
.setViewStateListener(new ViewStateListener() {
@Override
public void onPositionUpdate(int i, int i1) {
}
@Override
public void onShow() {
}
@Override
public void onHide() {
}
@Override
public void onDismiss() {
}
@Override
public void onMoveAnimStart() {
}
@Override
public void onMoveAnimEnd() {
}
@Override
public void onBackToDesktop() {
}
})
.setPermissionListener(new PermissionListener() {
@Override
public void onSuccess() {
}
@Override
public void onFail() {
}
})
.build();
FloatWindow.get().show();
}
/**
* 使用系統級別的WindowManager展示懸浮框，需要6.0以上的許可權；
*/
private void initView() {
if (Build.VERSION.SDK_INT >= 23) {
if (!Settings.canDrawOverlays(this)) {
Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setData(Uri.parse( "package:"+"com.example.administrator.xuanfudemo"));
startActivity(intent);
} else {
openWindow();
}
}else {
openWindow();
}
}
private void openWindow(){
windowManager = (WindowManager) this.getSystemService(WINDOW_SERVICE);
WindowManager.LayoutParams layoutParams = new WindowManager.LayoutParams();
layoutParams.height = ViewGroup.LayoutParams.WRAP_CONTENT;
layoutParams.width = ViewGroup.LayoutParams.WRAP_CONTENT;
layoutParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT;
// layoutParams.type = WindowManager.LayoutParams.TYPE_APPLICATION_ATTACHED_DIALOG;
// layoutParams.token = this.getWindow().getDecorView().getWindowToken();
layoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL;
layoutParams.format = PixelFormat.TRANSLUCENT;
layoutParams.gravity = Gravity.TOP | Gravity.RIGHT;
view = LayoutInflater.from(this).inflate(R.layout.view_win,null);
windowManager.addView(view,layoutParams);
}
private void initData() {
mHandler.sendEmptyMessageDelayed(HANDLERSIGN,HANDLERTIME);
}
@Override
public void onDestroy() {
super.onDestroy();
Log.i(TAG, "onDestroy: 啊，ByKill");
mHandler.removeCallbacksAndMessages(null);
if (windowManager != null) windowManager.removeView(view);
FloatWindow.destroy();
}
}