Android課程---關於Service的學習(後台運行)

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MainActivity.java

package com.hanqi.test2;import android.content.ComponentName;import android.content.Context;import android.content.Intent;import android.content.ServiceConnection;import android.os.IBinder;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.Toast;public class MainActivity extends AppCompatActivity {    protected void onCreate(Bundle savedInstanceState)     {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);    }    //一般方式啟動Service    //參考Activity 的啟動方式    public void bt1_onclick(View v)    {        //通過意圖Intent        //顯式意圖        Intent intent = new Intent(this,TestService1.class);        startService(intent);        Toast.makeText(MainActivity.this, "啟動Service", Toast.LENGTH_SHORT).show();    }    public void bt2_onclick(View v)    {        //通過意圖Intent        //顯式意圖        Intent intent = new Intent(this,TestService1.class);        stopService(intent);        Toast.makeText(MainActivity.this, "停止Service", Toast.LENGTH_SHORT).show();    }    ServiceConnection sc;    public void bt3_onclick(View v)    {        //通過意圖Intent        //顯式意圖        Intent intent = new Intent(this,TestService1.class);        if (sc == null) {            sc = new ServiceConnection() {                @Override                public void onServiceConnected(ComponentName name, IBinder service) {                    Log.e("TAG", "串連服務");                }                @Override                public void onServiceDisconnected(ComponentName name) {                    Log.e("TAG", "中斷連線服務");                }            };        }        //參數：意圖，串連，綁定方式 BIND_AUTO_CREATE:自動建立        bindService(intent,sc, Context.BIND_AUTO_CREATE);        Toast.makeText(MainActivity.this, "綁定服務成功", Toast.LENGTH_SHORT).show();    }    public void bt4_onclick(View v)    {        //判斷是否已經綁定，串連是否為空白        if (sc != null)        {            //解除綁定            unbindService(sc);            sc = null;            Toast.makeText(MainActivity.this, "解除綁定", Toast.LENGTH_SHORT).show();        }        else        {            Toast.makeText(MainActivity.this, "尚未綁定", Toast.LENGTH_SHORT).show();        }    }    @Override    protected void onDestroy() {        if (sc != null) {            //解除綁定            unbindService(sc);            sc = null;        }        super.onDestroy();    }}

TestService1.java

package com.hanqi.test2;import android.app.Service;import android.content.Intent;import android.os.Binder;import android.os.IBinder;import android.util.Log;public class TestService1 extends Service {    public TestService1() {        Log.e("TAG","構造Service");    }    //綁定的回調方法    //必須要重寫    @Override    public IBinder onBind(Intent intent) {        // TODO: Return the communication channel to the service.        //throw new UnsupportedOperationException("Not yet implemented");        Log.e("TAG","綁定被調用");        return new Binder();    }    @Override    public void onCreate() {        Log.e("TAG","建立Service");        super.onCreate();    }    @Override    public void onDestroy() {        Log.e("TAG","銷毀Service");        super.onDestroy();    }    @Override    public int onStartCommand(Intent intent, int flags, int startId) {        Log.e("TAG","啟動命令");        return super.onStartCommand(intent, flags, startId);    }    @Override    public boolean onUnbind(Intent intent) {        Log.e("TAG","解除綁定");        return super.onUnbind(intent);    }}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.hanqi.test2.MainActivity"    android:orientation="vertical">    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content">        <Button            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="一般啟動服務"            android:onClick="bt1_onclick"/>        <Button            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="一般停止服務"            android:onClick="bt2_onclick"/>    </LinearLayout>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content">        <Button            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="綁定啟動服務"            android:onClick="bt3_onclick"/>        <Button            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="解除綁定停止服務"            android:onClick="bt4_onclick"/>    </LinearLayout></LinearLayout>

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Android課程---關於Service的學習(後台運行)