Android在Service中弹出对话框二

世事洞明皆学问，人情练达即文章。这篇文章主要讲述Android在Service中弹出对话框二相关的知识，希望能为你提供帮助。
上一篇我也写了一篇弹窗的，但是经过测试，android8.0之后用不了，所以改一下
GitHub传送门
Myservice.class

package com.nf.service; import android.app.AlertDialog; import android.app.AliasActivity; import android.app.Dialog; import android.app.Service; import android.content.DialogInterface; import android.content.Intent; import android.os.Binder; import android.os.Build; import android.os.Handler; import android.os.IBinder; import android.os.Looper; import android.util.Log; import android.view.WindowManager; import android.widget.Toast; import java.sql.Time; import java.util.Objects; import java.util.Timer; import java.util.TimerTask; public class MyService extends Service { //全局声明Handler private Handler mHandler; public MyService() { }//创建一个服务 @Override public void onCreate() { super.onCreate(); mHandler = new Handler(Looper.getMainLooper()); }//服务启动 @Override public int onStartCommand(Intent intent, int flags, int startId) { Log.i("MyServer", "服务启动了"); Timer timer = new Timer(); int n = 5 * 60 * 10; timer.scheduleAtFixedRate(new TimerTask() { @Override public void run() { //new Thread(new Runnable() { //@Override //public void run() { //Looper.prepare(); //// TODO: 2019/11/7 //AlertDialog.Builder builder = new AlertDialog.Builder(MyApp.getContext()); //builder.setTitle("提示"); //builder.setMessage("已经过去五分钟了且行且珍惜"); //builder.setNegativeButton("明白了", null); //Dialog dialog = builder.create(); //dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT); //dialog.show(); //Looper.loop(); //} //}).start(); mHandler.post(new Runnable() { @Override public void run() { //AlertDialog.Builder builder = new AlertDialog.Builder(MyApp.getContext()); //builder.setTitle("提示"); //builder.setMessage("已经过去五分钟了且行且珍惜"); //builder.setNegativeButton("明白了", null); //Dialog dialog = builder.create(); //dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT); //dialog.show(); Log.i("MyServer", "服务启动了"); showDialog(); } }); Log.i("MyServer", "五分钟了"); } }, 10000, n); return super.onStartCommand(intent, flags, startId); }private void showDialog() { AlertDialog.Builder builder = new AlertDialog.Builder(getApplicationContext()) .setIcon(android.R.drawable.ic_dialog_info) .setTitle("提示") .setMessage("已经五分钟过去了时间不等人") .setPositiveButton("确定", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { } }); AlertDialog dialog = builder.create(); //设置点击其他地方不可取消此 Dialog dialog.setCancelable(false); dialog.setCanceledOnTouchOutside(false); //8.0系统加强后台管理，禁止在其他应用和窗口弹提醒弹窗，如果要弹，必须使用TYPE_APPLICATION_OVERLAY，否则弹不出 if (Build.VERSION.SDK_INT > = Build.VERSION_CODES.O) { Objects.requireNonNull(dialog.getWindow()).setType((WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY)); }else { Objects.requireNonNull(dialog.getWindow()).setType((WindowManager.LayoutParams.TYPE_SYSTEM_ALERT)); } dialog.show(); }//服务销毁 @Override public void onDestroy() { Log.i("MyServer", "服务死了"); super.onDestroy(); }@Override public IBinder onBind(Intent intent) { // TODO: Return the communication channel to the service. return new MyBinder(); }class MyBinder extends Binder { /** * 获取Service的方法 * @return 返回PlayerService */ public MyService getService() { return MyService.this; } }}

MainActivty.class

package com.nf.service; import androidx.appcompat.app.AppCompatActivity; import android.content.ComponentName; import android.content.Intent; import android.content.ServiceConnection; import android.net.Uri; import android.os.Build; import android.os.Bundle; import android.os.IBinder; import android.provider.Settings; import android.widget.Toast; public class MainActivity extends AppCompatActivity {public Intent intent; ServiceConnection serviceConnection = new ServiceConnection() { @Override public void onServiceConnected(ComponentName name, IBinder service) { //建立连接 //获取服务操作对象 MyService.MyBinder binder = (MyService.MyBinder) service; binder.getService(); //获取到Service }@Override public void onServiceDisconnected(ComponentName name) { } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); intent = new Intent(this, MyService.class); startService(intent); //启动服务 checkMyPermission(); }@Override protected void onDestroy() { super.onDestroy(); //stopService(intent); //程序销毁时，退出服务 } private void checkMyPermission() { if (Build.VERSION.SDK_INT > = Build.VERSION_CODES.M) { if (!Settings.canDrawOverlays(this)) { Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION, Uri.parse("package:" + getPackageName())); startActivityForResult(intent, 1); } } }@Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == 1) { if (Build.VERSION.SDK_INT > = Build.VERSION_CODES.M) { if (Settings.canDrawOverlays(this)) { Toast.makeText(this, "授权成功", Toast.LENGTH_SHORT).show(); } else { // SYSTEM_ALERT_WINDOW permission not granted... Toast.makeText(this, "未被授予权限，相关功能不可用", Toast.LENGTH_SHORT).show(); } } } } }

AndroidManifest.xml

< uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/> < !--这行代码必须存在，否则点击不了系统设置中的按钮--> < uses-permission android:name="android.permission.SYSTEM_OVERLAY_WINDOW" />