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Android如何实现定时自动静音小助手

界面设计 <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="h...

界面设计

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 android:orientation="vertical" >

 <Button
  android:id="@+id/btnAddAlarm1"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:text="添加静音开始时间" />
 <TextView
  android:id="@+id/tvAlarmRecord1"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:textSize="16dp" />
 
  <Button
   android:id="@+id/btnAddAlarm2"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:text="添加静音停止时间" />
  <TextView
  android:id="@+id/tvAlarmRecord2"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:textSize="16dp" /
</LinearLayout>

点击完按钮的会出现一个时间点设置的对话框 代码如下

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical" android:layout_width="fill_parent"
 android:layout_height="fill_parent">
 <TimePicker android:id="@+id/timepicker1"
  android:layout_width="fill_parent" android:layout_height="wrap_content" />
 
</LinearLayout>

效果图

Android如何实现定时自动静音小助手

功能设计

原理介绍

先简单介绍一下工作原理。在添加时间点之后,需要将所添加的时间点保存在文件或者数据库中,我使用了SharedPrefences来保存时间点,key和value都是时间点,然后用到AlarmManager每隔一分钟扫描一次,在扫描过程中从文件获取当前时间(时:分)的value,如果成功获得value就说明当前时间为时间点,此时调用audioManager ,当扫描掉button1设置的文件信息,就调用AudioManager.RINGER_MODE_SILENT,如果扫描到button2设置的文件信息,就调用AudioManager.RINGER_MODE_NORMAL,时期出去正常模式。

此程序包含两个java文件,分别是MainActivity.java和TimeReceiver.java,TimeReceiver主要是判断是否到达时间点,MainActivity 主要是整体的框架和逻辑。

MainActivity代码如下:

package com.example.timesilent;
import android.os.Bundle;
import android.app.Activity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.TimePicker;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;

public class MainActivity extends Activity implements OnClickListener 
{

 
 private SharedPreferences sharedPreferences1;
 private SharedPreferences sharedPreferences2;
 private TextView tvAlarmRecord1;
 private TextView tvAlarmRecord2;
 @Override
 public void onClick(View v) {
  View view =getLayoutInflater().inflate(R.layout.time,null);
  final TimePicker timePicker1=(TimePicker)view.findViewById(R.id.timepicker1);
  
  timePicker1.setIs24HourView(true);
  
  switch(v.getId())
  {
    case R.id.btnAddAlarm1:
    {
     new AlertDialog.Builder(this).setTitle("设置静音开始时间").setView(view).setPositiveButton("确定",new DialogInterface.OnClickListener(){
     

     @Override
    public void onClick(DialogInterface dialog,int which)
      {
       String timeStr=String.valueOf(timePicker1.getCurrentHour())+":"+String.valueOf(timePicker1.getCurrentMinute());
      
      tvAlarmRecord1.setText(tvAlarmRecord1.getText().toString()+"
"+timeStr);
       sharedPreferences1.edit().putString(timeStr,timeStr).commit();
      }
     }).setNegativeButton("取消",null).show();
     break;
    }
    case R.id.btnAddAlarm2:
    {
     new AlertDialog.Builder(this).setTitle("设置静音结束时间").setView(view).setPositiveButton("确定",new DialogInterface.OnClickListener(){
      @Override
      public void onClick(DialogInterface dialog,int which)
      {
       String timeStr=String.valueOf(timePicker1.getCurrentHour())+":"+String.valueOf(timePicker1.getCurrentMinute());
      
      tvAlarmRecord2.setText(tvAlarmRecord2.getText().toString()+"
"+timeStr);
       sharedPreferences2.edit().putString(timeStr,timeStr).commit();
      }
     }).setNegativeButton("取消",null).show();
     break;
    }
  }
 
  
 }
 @Override
 public void onCreate(Bundle savedInstanceState)
  {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_main);
   Button btnAddAlarm1 = (Button) findViewById(R.id.btnAddAlarm1);
   Button btnAddAlarm2 = (Button) findViewById(R.id.btnAddAlarm2);
   tvAlarmRecord1 = (TextView) findViewById(R.id.tvAlarmRecord1);
   tvAlarmRecord2 = (TextView) findViewById(R.id.tvAlarmRecord2);
   btnAddAlarm1.setOnClickListener(this);
   btnAddAlarm2.setOnClickListener(this);
   
   sharedPreferences1 = getSharedPreferences("alarm_record1",
     Activity.MODE_PRIVATE);
   sharedPreferences2 = getSharedPreferences("alarm_record2",
     Activity.MODE_PRIVATE);

   AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
   Intent intent = new Intent(this, TimeReceiver.class);
   PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0,
     intent, 0);
   alarmManager.setRepeating(AlarmManager.RTC, 0, 60 * 1000, pendingIntent);

  }
 
}

TimeReceiver的代码如下:

package com.example.timesilent;

import java.util.Calendar;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.media.AudioManager;
import android.content.SharedPreferences;


public class TimeReceiver extends BroadcastReceiver
{

 @Override
 public void onReceive(Context context, Intent intent)
 {
  
  SharedPreferences sharedPreferences1 = context.getSharedPreferences(
    "alarm_record1", Activity.MODE_PRIVATE);
  SharedPreferences sharedPreferences2 = context.getSharedPreferences(
    "alarm_record2", Activity.MODE_PRIVATE);
  String hour = String.valueOf(Calendar.getInstance().get(
    Calendar.HOUR_OF_DAY));
  String minute = String.valueOf(Calendar.getInstance().get(
    Calendar.MINUTE));
  String time1 = sharedPreferences1.getString(hour + ":" + minute, null);
  String time2 = sharedPreferences2.getString(hour + ":" + minute, null);
  AudioManager audioManager = (AudioManager)context.getSystemService(Context.AUDIO_SERVICE);
  if (time1!= null)
  { 
   audioManager.setRingerMode(AudioManager.RINGER_MODE_SILENT);
  }
  if (time2!= null)
  { 
   
   audioManager.setRingerMode(AudioManager.RINGER_MODE_NORMAL);
  }
  
 }

 
 
}

程序运行效果

初始状态

开始静音状态

恢复正常状态

源码地址

github:github.com/liu-roy/timeSilent