我刚开始 android 开发,我被困在这个问题上。当应用程序运行时,我会看到以下内容:
(如果链接断开或看不到图像,它只是一个带有三个按钮的横向模式菜单。)
这是我想看到的。但是,当我单击“开始播放”应该会导致 android 模拟器进入空白屏幕时,模拟器会退出我们的应用程序并说:“不幸的是,MainMenu 已停止。”
这是我在 LogCat 中遇到的错误:
04-15 21:49:08.779: W/dalvikvm(985): threadid=1: thread exiting with uncaught exception
(group=0x409961f8)
04-15 17:56:24.539: E/AndroidRuntime(739): FATAL EXCEPTION: main
04-15 17:56:24.539: E/AndroidRuntime(739):
android.content.ActivityNotFoundException: Unable to find explicit activity class
{com.example.quote.board/android.inputmethodservice.Keyboard}; have you declared this
activity in your AndroidManifest.xml?
04-15 17:56:24.539: E/AndroidRuntime(739): at
android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1508)
04-15 17:56:24.539: E/AndroidRuntime(739): at
android.app.Instrumentation.execStartActivity(Instrumentation.java:1384)
04-15 17:56:24.539: E/AndroidRuntime(739): at
android.app.Activity.startActivityForResult(Activity.java:3190)
04-15 17:56:24.539: E/AndroidRuntime(739): at
android.app.Activity.startActivity(Activity.java:3297)
04-15 17:56:24.539: E/AndroidRuntime(739): at
com.example.quote.board.MainMenu$1.onClick(MainMenu.java:30)
04-15 17:56:24.539: E/AndroidRuntime(739): at
android.view.View.performClick(View.java:3480)
04-15 17:56:24.539: E/AndroidRuntime(739): at
android.view.View$PerformClick.run(View.java:13983)
04-15 17:56:24.539: E/AndroidRuntime(739): at
android.os.Handler.handleCallback(Handler.java:605)
04-15 17:56:24.539: E/AndroidRuntime(739): at
android.os.Handler.dispatchMessage(Handler.java:92)
04-15 17:56:24.539: E/AndroidRuntime(739): at android.os.Looper.loop(Looper.java:137)
04-15 17:56:24.539: E/AndroidRuntime(739): at
android.app.ActivityThread.main(ActivityThread.java:4340)
04-15 17:56:24.539: E/AndroidRuntime(739): at
java.lang.reflect.Method.invokeNative(Native Method)
04-15 17:56:24.539: E/AndroidRuntime(739): at
java.lang.reflect.Method.invoke(Method.java:511)
04-15 17:56:24.539: E/AndroidRuntime(739): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
04-15 17:56:24.539: E/AndroidRuntime(739): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
04-15 17:56:24.539: E/AndroidRuntime(739): at
dalvik.system.NativeStart.main(NativeMethod)
我目前有两个班。这是我的第一堂课,叫做 MainMenu:
package com.example.quote.board;
import android.inputmethodservice.Keyboard;
import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.ActionBar;
import android.app.Activity;
import android.content.Intent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainMenu extends Activity {
@SuppressLint({ "NewApi", "NewApi", "NewApi" })
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_menu);
ActionBar action= getActionBar();
action.hide();
Button startPlaying = (Button) findViewById(R.id.startPlaying);
Button specialKeyboard = (Button) findViewById(R.id.specialKeyboards);
Button info = (Button) findViewById(R.id.info);
startPlaying.setOnClickListener(new OnClickListener(){
public void onClick(View v){
Intent intent = new Intent(getApplicationContext(), Keyboard.class);
startActivity(intent);
}
});
}
}
我的另一门课叫做键盘:
package com.example.quote.board;
import android.app.ActionBar;
import android.app.Activity;
import android.os.Bundle;
public class Keyboard extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.keyboard);
ActionBar action = getActionBar();
action.hide();
}
}
这是我的 AndroidManifest.xml 文件:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.quote.board"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="11"
android:targetSdkVersion="15" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme"
>
<activity
android:name=".MainMenu"
android:screenOrientation="landscape"
android:label="@string/title_activity_main_menu" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.example.quote.board.Keyboard"
android:screenOrientation="landscape"
android:label="@string/app_name" >
</activity>
</application>
</manifest>
顺便说一句,我一直在和我的朋友一起做这个,他在 Windows 电脑上工作。我们使用 git 将文件传输给我。此外,这个应用程序的工作方式也完全符合他的要求。