我正在使用android 2.2和eclipse制作一个Android应用程序。 它是一个简单的应用程序,应该将活动从“CoverPageApp.java”更改为“LoginActivity.java” 然后到另一个活动。 但是,当我单击CoverPageApp.java中的“开始按钮”时,应用程序强制关闭。
LoginActivity.java
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class LoginActivity extends Activity {
Button btnLinkToRegistrScrn;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
addListenerOnButton();
btnLinkToRegistrScrn = (Button) findViewById(R.id.LinkToRegisterScreen);
}
public void addListenerOnButton() {
final Context context2 = this;
Button loginbtn1 = (Button) findViewById(R.id.btnLogin);
loginbtn1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
Intent intent = new Intent(context2, DashboardActivity.class);
context2.startActivity(intent);
}
});
}
{
// Link to Register Screen
btnLinkToRegistrScrn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent i = new Intent(getApplicationContext(), CAActivity.class);
startActivity(i);
}
});
}
}
logcat的
05-31 12:37:08.620: D/AndroidRuntime(629): Shutting down VM
05-31 12:37:08.620: W/dalvikvm(629): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
05-31 12:37:08.630: E/AndroidRuntime(629): FATAL EXCEPTION: main
05-31 12:37:08.630: E/AndroidRuntime(629): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1404)
05-31 12:37:08.630: E/AndroidRuntime(629): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1378)
05-31 12:37:08.630: E/AndroidRuntime(629): at android.app.Activity.startActivityForResult(Activity.java:2817)
05-31 12:37:08.630: E/AndroidRuntime(629): at android.app.Activity.startActivity(Activity.java:2923)
05-31 12:37:08.630: E/AndroidRuntime(629): at android.view.View.performClick(View.java:2408)
05-31 12:37:08.630: E/AndroidRuntime(629): at android.view.View$PerformClick.run(View.java:8816)
05-31 12:37:08.630: E/AndroidRuntime(629): at android.os.Handler.handleCallback(Handler.java:587)
05-31 12:37:08.630: E/AndroidRuntime(629): at android.os.Handler.dispatchMessage(Handler.java:92)
05-31 12:37:08.630: E/AndroidRuntime(629): at android.os.Looper.loop(Looper.java:123)
05-31 12:37:08.630: E/AndroidRuntime(629): at android.app.ActivityThread.main(ActivityThread.java:4627)
05-31 12:37:08.630: E/AndroidRuntime(629): at java.lang.reflect.Method.invokeNative(Native Method)
05-31 12:37:08.630: E/AndroidRuntime(629): at java.lang.reflect.Method.invoke(Method.java:521)
05-31 12:37:08.630: E/AndroidRuntime(629): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
05-31 12:37:08.630: E/AndroidRuntime(629): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
05-31 12:37:08.630: E/AndroidRuntime(629): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分:2)
请查看以下内容:
打开您的清单文件:
现在添加活动:
保存您的清单文件并再次运行您的项目。
现在您的manifest.xml如下所示:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.test_new"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="3" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".Test_newActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".LoginActivity"></activity>
</application>
</manifest>
答案 1 :(得分:1)
我认为您尚未添加活动
LoginActivity.java
在Android清单文件中 只需将以下代码添加到AndroidManifest.xml文件
即可<application>
<activity
android:name=".LoginActivity"
android:label="@string/login_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.HOME" />
</intent-filter>
</activity>
</application>