5.24

所花时间（包括上课）：2

打码量(行)：210

博客量(篇)：1

了解到知识点：学习实现图片拖动

 

package com.example.myapp;

 

import android.app.IntentService;

import android.content.Intent;

import android.util.Log;

 

public class MyIntentService extends IntentService {

 

    private static final String TAG = "MyIntentService";

 

    public MyIntentService() {

        super("MyIntentService");

    }

 

    @Override

    protected void onHandleIntent(Intent intent) {

        // 在这里执行耗时操作，例如网络请求或文件操作

        String input = intent.getStringExtra("inputExtra");

        Log.d(TAG, "onHandleIntent: Starting background task with input: " + input);

 

        // 模拟一个耗时操作

        try {

            Thread.sleep(3000); // 休眠3秒钟，模拟耗时操作

        } catch (InterruptedException e) {

            Thread.currentThread().interrupt();

        }

 

        // 任务完成后，可以通过广播或通知来通知用户

        Log.d(TAG, "onHandleIntent: Background task completed");

    }

 

    @Override

    public void onDestroy() {

        super.onDestroy();

        Log.d(TAG, "onDestroy: IntentService destroyed");

    }

}

package com.example.myapp;

 

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

 

import androidx.appcompat.app.AppCompatActivity;

 

public class MainActivity extends AppCompatActivity {

 

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

    }

 

    public void startIntentService(View view) {

        Intent intent = new Intent(this, MyIntentService.class);

        intent.putExtra("inputExtra", "Input data for IntentService");

        startService(intent);

    }

}

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent">

 

    <Button

        android:id="@+id/startIntentServiceButton"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Start IntentService"

        android:onClick="startIntentService"

        android:layout_centerInParent="true" />

 

</RelativeLayout>