我正在开发一个应用程序,我可以启动有两个按钮的 Launcher Activity 。当单击这些按钮中的任何一个时,应打开一个新 Activity 。但是,随后会发生运行时错误。
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class Intro extends Activity {
Button searchBut, fbButton;
@Override
protected void onResume() {
super.onResume();
}
@Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
AppSettings.loadLogin(getApplicationContext());
setContentView(R.layout.intro);
if (AppSettings.logged) {
Intent a = new Intent(Intro.this, AllChallengesPager.class);
a.putExtra("logging", "0");
startActivity(a);
}
searchBut = (Button) findViewById(R.id.button2);
searchBut.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent a = new Intent(Intro.this, DetailedChallenge.class);
a.putExtra("logging", "0");
startActivity(a);
}
});
fbButton = (Button) findViewById(R.id.fbBut);
fbButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent a = new Intent(Intro.this, AllChallengesPager.class);
a.putExtra("logging", "1");
startActivity(a);
}
});
AppSettings.loadLogin(getApplicationContext());
}
}
06-07 11:26:07.776: E/AndroidRuntime(13305): FATAL EXCEPTION: main
06-07 11:26:07.776: E/AndroidRuntime(13305): java.lang.NoClassDefFoundError: com.loopj.android.http.RequestParams
06-07 11:26:07.776: E/AndroidRuntime(13305): at com.example.challengeZygio.DetailedChallenge.onCreate(DetailedChallenge.java:216)
06-07 11:26:07.776: E/AndroidRuntime(13305): at android.app.Activity.performCreate(Activity.java:5047)
06-07 11:26:07.776: E/AndroidRuntime(13305): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
06-07 11:26:07.776: E/AndroidRuntime(13305): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2056)
06-07 11:26:07.776: E/AndroidRuntime(13305): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2117)
06-07 11:26:07.776: E/AndroidRuntime(13305): at android.app.ActivityThread.access$700(ActivityThread.java:134)
06-07 11:26:07.776: E/AndroidRuntime(13305): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1218)
06-07 11:26:07.776: E/AndroidRuntime(13305): at android.os.Handler.dispatchMessage(Handler.java:99)
06-07 11:26:07.776: E/AndroidRuntime(13305): at android.os.Looper.loop(Looper.java:137)
06-07 11:26:07.776: E/AndroidRuntime(13305): at android.app.ActivityThread.main(ActivityThread.java:4867)
06-07 11:26:07.776: E/AndroidRuntime(13305): at java.lang.reflect.Method.invokeNative(Native Method)
06-07 11:26:07.776: E/AndroidRuntime(13305): at java.lang.reflect.Method.invoke(Method.java:511)
06-07 11:26:07.776: E/AndroidRuntime(13305): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1007)
06-07 11:26:07.776: E/AndroidRuntime(13305): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:774)
06-07 11:26:07.776: E/AndroidRuntime(13305): at dalvik.system.NativeStart.main(Native Method)
- 我所有的 jar 库都放在 libs 文件夹中
- 我已经清理了项目并重新启动了几次 Eclipse
- 我正在使用带有所有最新更新的 Eclipse Juno
Best Answer-推荐答案
右键单击您的项目 -> 属性 -> Java 构建路径 -> 订购和导出
到达这里后,您使用过的库,“选择”这些库并将它们移动到列表顶部。即假设您使用了“xyz.jar”文件,那么以下将是您的序列。
[x] xyz.jar
[x] 安卓 x.x
[x] Android 依赖项
....
保存更改并在清理后重新构建您的项目。
关于android - 没有找到类定义错误 (android),我们在Stack Overflow上找到一个类似的问题:
https://stackoverflow.com/questions/16980159/
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