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Android中如何使用Alarm,針對這個問題,這篇文章詳細介紹了相對應的分析和解答,希望可以幫助更多想解決這個問題的小伙伴找到更簡單易行的方法。
用AlarmManager來設置自己的鬧鐘,其中我們主要用到的類有
import android.app.AlarmManager; import android.app.PendingIntent; import android.app.TimePickerDialog;
這三個是我們必須要用到的類,大家可要記住呀,可不能用錯包呀,還有就是最重要的一點,也是大家容易忘了的一點,我們一定要加上權限,這樣我們才能順利的實現我們想要的效果,代碼如下:
java代碼:
package eoe.demo; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.widget.Toast; public class AlamrReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { // TODO Auto-generated method stub Toast.makeText(context, "鬧鐘時間到", Toast.LENGTH_LONG).show(); } }
Java代碼:
package eoe.demo; import java.util.Calendar; import android.app.Activity; import android.app.AlarmManager; import android.app.PendingIntent; import android.app.TimePickerDialog; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; import android.widget.TimePicker; public class Test extends Activity { /** Called when the activity is first created. */ private TextView tv = null; private Button btn_set = null; private Button btn_cel = null; private Calendar c = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); tv = (TextView) this.findViewById(R.id.TextView); btn_set = (Button) this.findViewById(R.id.Button01); btn_cel = (Button) this.findViewById(R.id.Button02); c = Calendar.getInstance(); btn_set.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v) { // TODO Auto-generated method stub c.setTimeInMillis(System.currentTimeMillis()); int hour = c.get(Calendar.HOUR_OF_DAY); int minute = c.get(Calendar.MINUTE); new TimePickerDialog(Test.this,new TimePickerDialog.OnTimeSetListener(){ public void onTimeSet(TimePicker view, int hourOfDay, int minute) { // TODO Auto-generated method stub c.setTimeInMillis(System.currentTimeMillis()); c.set(Calendar.HOUR_OF_DAY, hourOfDay); c.set(Calendar.MINUTE, minute); c.set(Calendar.SECOND, 0); c.set(Calendar.MILLISECOND, 0); Intent intent = new Intent(Test.this,AlamrReceiver.class); PendingIntent pi = PendingIntent.getBroadcast(Test.this, 0, intent, 0); AlarmManager am = (AlarmManager) getSystemService(Activity.ALARM_SERVICE); am.set(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(), pi);//設置鬧鐘 am.setRepeating(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(), (10*1000), pi);//重復設置 tv.setText("設置的鬧鐘時間為:"+hourOfDay+":"+minute); } },hour,minute,true).show(); } }); btn_cel.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v) { // TODO Auto-generated method stub Intent intent = new Intent(Test.this,AlamrReceiver.class); PendingIntent pi = PendingIntent.getBroadcast(Test.this, 0, intent, 0); AlarmManager am = (AlarmManager) getSystemService(Activity.ALARM_SERVICE); am.cancel(pi); tv.setText("鬧鐘取消"); } }); } }
Java代碼:
<?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"> <TextView android:layout_width="fill_parent" android:id="@+id/TextView" android:layout_height="wrap_content" android:text="@string/hello" /> <Button android:text="設置鬧鐘" android:id="@+id/Button01" android:layout_width="wrap_content" android:layout_height="wrap_content"> </Button> <Button android:text="取消鬧鐘" android:id="@+id/Button02" android:layout_width="wrap_content" android:layout_height="wrap_content"> </Button> </LinearLayout>
Java代碼:
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="eoe.demo" android:versionCode="1" android:versionName="1.0"> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".Test" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <receiver android:name=".AlamrReceiver" android:process=":remote"></receiver> </application> </manifest>
關于Android中如何使用Alarm問題的解答就分享到這里了,希望以上內容可以對大家有一定的幫助,如果你還有很多疑惑沒有解開,可以關注億速云行業資訊頻道了解更多相關知識。
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