版权声明：本文可能为博主原创文章，若标明出处可随便转载。 https://blog.csdn.net/Jailman/article/details/78016364
实际上并无扣费功能，只是一个简单的按钮功能示例
AndroidManifest.xml文件
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="eu.apps.jmeyer.prankingstudio">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".testActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
MainActivity，回退按钮被重定义
package eu.apps.jmeyer.prankingstudio;
import android.content.Intent;
import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final Button cost = (Button) findViewById(R.id.costbutton);
final Button jump = (Button) findViewById(R.id.jumpbutton);
final RelativeLayout layout = (RelativeLayout) this.findViewById(R.id.activity_main);
final boolean[] visibility_Flag = {false};
cost.setOnClickListener(new View.OnClickListener(){
public void onClick(View view){
if(visibility_Flag[0]){
Intent intent = new Intent(MainActivity.this, MainActivity.class);
startActivity(intent);
visibility_Flag[0] = false;
} else {
layout.setBackgroundColor(Color.GREEN);
TextView lblTitle=(TextView)findViewById(R.id.blufftext);
lblTitle.setText("恭喜！扣费成功，您目前欠费250元！");
lblTitle.setTextColor(Color.RED);
visibility_Flag[0] =true;
}
}
});
jump.setOnClickListener(new View.OnClickListener(){
public void onClick(View view){
Intent intent = new Intent(MainActivity.this, testActivity.class);
startActivity(intent);
}
});
}
/**
* 监听Back键按下事件,方法1:
* 注意:
* super.onBackPressed()会自动调用finish()方法,关闭
* 当前Activity.
* 若要屏蔽Back键盘,注释该行代码即可
*/
@Override
public void onBackPressed() {
super.onBackPressed();
System.out.println("按下了back键 onBackPressed()");
}
/**
* 监听Back键按下事件,方法2:
* 注意:
* 返回值表示:是否能完全处理该事件
* 在此处返回false,所以会继续传播该事件.
* 在具体项目中此处的返回值视情况而定.
*/
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK)) {
System.out.println("按下了back键 onKeyDown()");
return false;
}else {
return super.onKeyDown(keyCode, event);
}
}
@Override
protected void onDestroy() {
super.onDestroy();
System.out.println("执行 onDestroy()");
}
}
testActivity
package eu.apps.jmeyer.prankingstudio;
import android.app.Activity;
import android.os.Bundle;
/**
* Created by jailman on 2017/9/15.
*/
public class testActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.testlayout);
}
}
layout activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
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"
android:theme="@android:style/Theme.Black.NoTitleBar"
tools:context="eu.apps.jmeyer.prankingstudio.MainActivity">
<TextView
android:id="@+id/blufftext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="点击按钮有惊喜！"
android:layout_centerHorizontal="true" />
<Button
android:id="@+id/costbutton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="惊喜！"
android:layout_below="@+id/blufftext"
android:layout_alignParentStart="true"
android:layout_marginStart="70dp"
android:layout_marginTop="112dp" />
<Button
android:id="@+id/jumpbutton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/costbutton"
android:layout_alignBottom="@+id/costbutton"
android:layout_marginStart="66dp"
android:layout_toEndOf="@+id/costbutton"
android:text="跳转！" />
</RelativeLayout>
layout testlayout.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/testlayout">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="This is test view!"
android:layout_marginTop="169dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
build.gradle
apply plugin: 'com.android.application'
android {
compileSdkVersion 24
buildToolsVersion '25.0.0'
defaultConfig {
applicationId "eu.apps.jmeyer.prankingstudio"
minSdkVersion 19
targetSdkVersion 24
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:24.2.1'
testCompile 'junit:junit:4.12'
}
