<?xml version="1
.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas
.android
.com/apk/res/android"
package="com
.example
.myapplication2">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:
theme="@style/
Theme.AppCompat.Light
.DarkActionBar">
<!-- 先确保 MainActivity 能启动 -->
<activity
android:name="
.MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android
.intent
.action
.MAIN" />
<category android:name="android
.intent
.category
.LAUNCHER" />
</intent-filter>
</activity>
<!-- 简化 Service 注册 -->
<service
android:name="
.Service
.MyService2"
android:enabled="true"
android:exported="false" />
</application>
</manifest>package com
.example
.myapplication2;
import android
.content
.Intent;
import android
.os
.Bundle;
import android
.view
.View;
import android
.widget
.Button;
import androidx
.appcompat.app
.AppCompatActivity;
import com
.example
.myapplication2
.R;
import Service
.MyService2;
public class MainActivity extends
AppCompatActivity {
private Intent mIntent;
private
Button btnStartService;
private
Button btnStopService;
@Override
protected void onCreate(Bundle savedInstanceState) {
super
.onCreate(savedInstanceState);
setContentView(R
.layout
.activity_service);
initView();
mIntent = new Intent(this, MyService2
.class);
}
private void initView() {
btnStartService = findViewById(R
.id
.btn_start_service);
btnStopService = findViewById(R
.id
.btn_stop_service);
btnStartService
.setOnClickListener(new View
.OnClickListener() {
@Override
public void onClick(View v) {
startService(mIntent);
}
});
btnStopService
.setOnClickListener(new View
.OnClickListener() {
@Override
public void onClick(View v) {
stopService(mIntent);
}
});
}
}package Service;
import android
.app
.Service;
import android
.content
.Intent;
import android
.os
.IBinder;
import android
.util
.Log;
public class MyService2 extends Service {
private static final String TAG = "MyService2";
private int counter = 0;
private boolean isRunning = false;
public MyService2() {
}
@Override
public void onCreate() {
super
.onCreate();
Log
.e(TAG, "onCreate: ");
startCounter();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log
.e(TAG, "onStartCommand: 当前计数 = " + counter);
return START_STICKY;
}
@Override
public void onDestroy() {
super
.onDestroy();
Log
.e(TAG, "onDestroy: 最终计数 = " + counter);
stopCounter();
}
// 启动计数器
private void startCounter() {
isRunning = true;
new Thread(new Runnable() {
@Override
public void run() {
while (isRunning) {
try {
Thread
.sleep(1000); // 1秒
counter++;
Log
.e(TAG, "计数器: " + counter + " 秒");
} catch (InterruptedException e) {
break;
}
}
}
})
.start();
}
// 停止计数器
private void stopCounter() {
isRunning = false;
}
@Override
public IBinder onBind(Intent intent) {
Log
.e(TAG, "onBind: ");
return null;
}
}怎么修改使程序能欧成功运行，提供修改后的完整代码
本文探讨了在Android 5.0及以上版本中使用Theme.AppCompat时，Button默认为全大写的问题，并提供了三种解决方案：更换主题、使用5.0以下API及设置Button属性。
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