我的MainActivity java文件
package com.example.lenovo.infinity.app;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Typeface;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdView;
public class MainActivity extends Activity {
RelativeLayout btn;
ImageView imageView;
TextView textView;
private AdView adView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
adView = (AdView)findViewById(R.id.adsView);
//adView.setAdSize(AdSize.SMART_BANNER);
AdRequest adRequest = new AdRequest.Builder().build();
adView.loadAd(adRequest);
//set font to text view
textView = (TextView)findViewById(R.id.start_Text);
Typeface custom = Typeface.createFromAsset(getAssets(),"fonts/font.ttf");
textView.setTypeface(custom);
btn.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
return false;
}
});
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent myIntent = new Intent(MainActivity.this, Game.class);
startActivity(myIntent);
}
});
}
}
游戏java文件
package com.example.lenovo.infinity.app;
import android.app.Activity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.RelativeLayout;
public class Game extends Activity {
View pauseButton;
RelativeLayout Rel_main_game;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_game);
DisplayMetrics dm = new DisplayMetrics();
this.getWindowManager().getDefaultDisplay().getMetrics(dm);
final int heights = dm.heightPixels;
final int widths = dm.widthPixels;
LayoutInflater layoutInflater = (LayoutInflater)getApplicationContext()
.getSystemService(getApplicationContext().LAYOUT_INFLATER_SERVICE);
pauseButton = layoutInflater.inflate(R.layout.activity_pause,null,false);
pauseButton.setX(widths - 250);
pauseButton.setY(0);
Rel_main_game.addView(pauseButton);
pauseButton.getLayoutParams().height = 250;
pauseButton.getLayoutParams().width = 250;
}
}
在我的项目中，我有三个布局：第一个，布局是主要活动，有开始按钮，第二个布局是游戏面板，其中包含一个暂停按钮，按钮是第三个布局
XML文件是 第一个XML，这个xml有开始按钮
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:id="@+id/main_activity"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/imageView"
android:scaleType="fitXY"
android:src="@drawable/game_bg"
android:contentDescription="@string/bg" />
<RelativeLayout
android:layout_width="@dimen/layout_width"
android:layout_height="@dimen/layout_height"
android:layout_alignParentBottom="true"
android:layout_centerVertical="true"
android:layout_marginBottom="@dimen/layout_marginBottom"
android:layout_marginLeft="@dimen/layout_marginLeft"
android:layout_weight="1">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/StartBtn"
android:layout_centerVertical="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginLeft="0dp"
android:layout_marginStart="0dp"
android:src="@drawable/btn"
android:scaleType="fitXY" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/start_game"
android:id="@+id/start_Text"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:textSize="@dimen/textSize"
android:textAppearance="@android:style/TextAppearance.Medium" />
</RelativeLayout>
<com.google.android.gms.ads.AdView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/adsView"
android:layout_centerHorizontal="true"
android:layout_alignParentBottom="true"
ads:adSize="BANNER"
ads:adUnitId="ca-app-pub-5303974617236905/1000694879" />
</RelativeLayout>
第二个XML，它包含带有暂停按钮的主游戏面板
<?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:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/rel_main_game"
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.example.lenovo.infinity.app.Game">
</RelativeLayout>
第三种布局是暂停按钮
<?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:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/pause"
tools:context="com.example.lenovo.infinity.app.Pause"
android:background="#000000">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/pauseImage"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:layout_margin="@dimen/pause_margin"
android:scaleType="fitXY"
android:src="@drawable/btn" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="II"
android:id="@+id/textView"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:textSize="@dimen/pause_text_size"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#ffffff" />
</RelativeLayout>
我的清单文件
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.lenovo.infinity.app">
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen">
<activity
android:name=".MainActivity"
android:screenOrientation="landscape">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
<activity
android:name="com.google.android.gms.ads.AdActivity"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize" />
<activity
android:name=".Game"
android:screenOrientation="landscape" >
</activity>
</application>
</manifest>
logcat的
04-04 19:47:25.021 8325-8432/? D/GassUtils: Found app info for package com.example.lenovo.infinity.app:1. Hash: e93251d423a7add58a3428a9e259cdd8b57c335ec3a30cc9897279fdeed6e512
04-04 19:47:25.021 8325-8432/? D/k: Found info for package com.example.lenovo.infinity.app in db.
04-04 19:47:25.235 514-703/? V/ActivityManager: com.example.lenovo.infinity.app/.MainActivity: task=TaskRecord{41c684b8 #132 A com.example.lenovo.infinity.app U 0}
04-04 19:47:25.774 8409-8409/? E/AndroidRuntime: FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.lenovo.infinity.app/com.example.lenovo.infinity.app.MainActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2306)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2358)
at android.app.ActivityThread.access$600(ActivityThread.java:156)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1340)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:153)
at android.app.ActivityThread.main(ActivityThread.java:5297)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.example.lenovo.infinity.app.MainActivity.onCreate(MainActivity.java:38)
at android.app.Activity.performCreate(Activity.java:5122)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1081)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2270)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2358)
at android.app.ActivityThread.access$600(ActivityThread.java:156)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1340)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:153)
at android.app.ActivityThread.main(ActivityThread.java:5297)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
at dalvik.system.NativeStart.main(Native Method)
04-04 19:47:25.782 514-531/? W/ActivityManager: Force finishing activity com.example.lenovo.infinity.app/.MainActivity
04-04 19:47:25.789 131-131/? I/BufferQueue: [Starting com.example.lenovo.infinity.app](this:0x41f78008,api:2) new GraphicBuffer needed
04-04 19:47:25.803 131-14023/? I/BufferQueue: [Starting com.example.lenovo.infinity.app](this:0x41f78008,api:2) [queue] fps:0.28, dur:3530.34, max:3530.34, min:3530.34
04-04 19:47:25.820 131-204/? I/SurfaceTexture: [Starting com.example.lenovo.infinity.app](this:0x41f91558,api:2) [void* android::SurfaceTexture::createImage(EGLDisplay, const android::sp<android::GraphicBuffer>&)]
04-04 19:47:25.943 8409-8454/? D/dalvikvm: open_cached_dex_file : /data/data/com.example.lenovo.infinity.app/cache/ads1962259775.jar /data/data/com.example.lenovo.infinity.app/cache/ads1962259775.dex
04-04 19:47:26.024 514-535/? V/WindowManager: Changing focus from null to Window{41cae560 u0 Application Error: com.example.lenovo.infinity.app}
04-04 19:47:26.024 514-534/? I/WindowManager: Gaining focus: Window{41cae560 u0 Application Error: com.example.lenovo.infinity.app}
logcat的
答案 0 :(得分：0)
您对开始和暂停按钮使用相同的按钮：
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/pauseImage"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:layout_margin="@dimen/pause_margin"
android:scaleType="fitXY"
android:src="@drawable/btn" />
将其更改为：
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/pauseImage"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:layout_margin="@dimen/pause_margin"
android:scaleType="fitXY"
android:src="@drawable/btn_pause" />
其中btn_pause是暂停图像的来源。
答案 1 :(得分：0)
在第二个xml中，您提到您有暂停按钮，但您发布的代码段仅具有相对布局。如果要在另一个视图的顶部显示按钮，请使用Framelayout。
同样在第三个xml中，您需要更改src以暂停图像引用。目前你指的是同一个btn图像。
答案 2 :(得分：0)
在mainActivity中添加此内容
imageView = (ImageView)findViewById(R.id.StartBtn);
btn = (RelativeLayout)findViewById(R.id.Start_layout);