我认为
Button bTutorial1 = (Button) findViewById(R.layout.tutorial1);
bTutorial1.setOnClickListener(new View.OnClickListener() {
等于“空”。
(我在某处读过它，但没有看到解决方案)
如果这不是问题，我不知道..
感谢我能得到的任何帮助。
此致，罗宾
activity_main代码:
<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"
tools:context=".MainActivity" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:src="@drawable/ic_launcher" />
<Button
android:id="@+id/gotoKanal2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="@+id/gotoKanal3"
android:layout_alignParentLeft="true"
android:layout_marginBottom="14dp"
android:text="@string/tv_2" />
<Button
android:id="@+id/gotoKanal3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="@+id/tutorial1"
android:layout_alignParentLeft="true"
android:layout_marginBottom="14dp"
android:text="@string/tv_3" />
<Button
android:id="@+id/tutorial1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="@+id/tutorial2"
android:layout_alignParentLeft="true"
android:layout_marginBottom="14dp"
android:text="TUTORIALONE" />
<Button
android:id="@+id/tutorial2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="@+id/gotoKanal6"
android:layout_alignParentLeft="true"
android:layout_marginBottom="14dp"
android:text="-||- 2" />
<Button
android:id="@+id/gotoKanal6"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_marginBottom="14dp"
android:text="@string/tv_6" />
<Button
android:id="@+id/gotoKanal1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="@+id/gotoKanal2"
android:layout_alignParentLeft="true"
android:layout_marginBottom="14dp"
android:text="@string/tv_1" />
</RelativeLayout>
mainifest代码:忽略所有.tv
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.Robin.Robin"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
<activity
android:name="com.Robin.Robin.MainActivity"
android:label="@string/app_name"
android:theme="@android:style/Theme.NoTitleBar" >
<intent-filter >
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<activity
android:name="myMenu"
android:label="@string/app_name"
android:theme="@android:style/Theme.Black.NoTitleBar" >
<intent-filter >
<action android:name="com.Robin.Robin.CLEARSCREEN"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>
<activity
android:name=".tutorialOne"
android:label="@string/app_name"
android:theme="@android:style/Theme.Black.NoTitleBar" >
<intent-filter >
<action android:name="com.Robin.Robin.TUTORIALONE"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>
<activity
android:name=".tv2"
android:label="@string/app_name"
android:theme="@android:style/Theme.Black.NoTitleBar" >
<intent-filter >
<action android:name="com.Robin.Robin.tv2"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>
<activity
android:name=".tv3"
android:label="@string/app_name"
android:theme="@android:style/Theme.Black.NoTitleBar" >
<intent-filter >
<action android:name="com.Robin.Robin.tv3"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>
<activity
android:name="com.Robin.Robin.tv4"
android:label="@string/app_name"
android:theme="@android:style/Theme.Black.NoTitleBar" >
<intent-filter >
<action android:name="com.Robin.Robin.tv4"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>
<activity
android:name=".tv5"
android:label="@string/app_name"
android:theme="@android:style/Theme.Black.NoTitleBar" >
<intent-filter >
<action android:name="com.Robin.Robin.tv5"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>
<activity
android:name=".tv6"
android:label="@string/app_name"
android:theme="@android:style/Theme.Black.NoTitleBar" >
<intent-filter >
<action android:name="com.Robin.Robin.tv6"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>
</application>
</manifest>
启动代码:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:src="@drawable/default_320x480" />
</LinearLayout>
myMeny.java 代码:
package com.Robin.Robin;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class myMenu extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button bTutorial1 = (Button) findViewById(R.layout.tutorial1);
bTutorial1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
startActivity(new Intent("com.Robin.Robin.TUTORIALONE"));
}
});
Button bgotoKanal4 = (Button) findViewById(R.id.gotoKanal4);
bgotoKanal4.setOnClickListener( new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
startActivity (new Intent ("package com.Robin.Robin.tv4"));
Button bgotoKanal2 = (Button) findViewById(R.id.gotoKanal2);
bgotoKanal2.setOnClickListener( new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
startActivity (new Intent ("package com.Robin.Robin.tv2"));
Button bgotoKanal3 = (Button) findViewById(R.id.gotoKanal3);
bgotoKanal3.setOnClickListener( new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
startActivity (new Intent ("package com.Robin.Robin.tv3"));
Button bgotoKanal1 = (Button) findViewById(R.id.gotoKanal1);
bgotoKanal1.setOnClickListener( new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
startActivity (new Intent ("package com.Robin.Robin.tv1"));
Button bgotoKanal5 = (Button) findViewById(R.id.gotoKanal5);
bgotoKanal5.setOnClickListener( new View.OnClickListener() {
@Override
public void onClick(View v) {
TODO Auto-generated method stub
startActivity (new Intent ("package com.Robin.Robin.tv5"));
Button bgotoKanal6 = (Button) findViewById(R.id.gotoKanal6);
bgotoKanal6.setOnClickListener( new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
startActivity (new Intent ("package com.Robin.Robin.tv6"));
}
} );
}
} );
}
} );
}
} );
}
} );
}
} );
}
}
主要 Activity 代码:
package com.Robin.Robin;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.app.Activity;
public class MainActivity extends Activity {
MediaPlayer mpSplash;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.splash);
mpSplash = MediaPlayer.create(this, R.raw.javaintro);
mpSplash.start();
Thread logoTimer = new Thread(){
public void run(){
try{
int logoTimer = 0;
while(logoTimer < 5000){
sleep(100);
logoTimer = logoTimer + 100;
}
startActivity(new Intent("com.Robin.Robin.CLEARSCREEN"));
}
catch (InterruptedException e){
e.printStackTrace();
}
finally{
finish();
}
}
};
logoTimer.start();
}
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
mpSplash.release();
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
mpSplash.pause();
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
mpSplash.start();
}
@Override
protected void onStart() {
// TODO Auto-generated method stub
super.onStart();
}
@Override
protected void onStop() {
// TODO Auto-generated method stub
super.onStop();
}
}
最佳答案
Button bTutorial1 = (Button) findViewById(R.layout.tutorial1);
应该是
Button bTutorial1 = (Button) findViewById(R.id.tutorial1);
因为你的Button在xml中定义为
<Button
android:id="@+id/tutorial1"
android:layout_width="match_parent"
...
它将在 R.id 中定义，因此，您将其检索为 R.id.tutorial1
除了问题之外，您是否忘记关闭 OnClickListener？
bgotoKanal2.setOnClickListener( new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
startActivity (new Intent ("package com.Robin.Robin.tv2"));
});//closes the listener, add it to each one.
关于java - 简单的菜鸟应用程序每次都会崩溃..(空)？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/14664678/