[英]Android using Intents
我无法从应用程序中调用意图,所以说我有主类[A]我无法通过Intent调用下载程序类[B]
所有类都有自己的布局和其他功能
Main.java:
[...]
Intent i = new Intent(".downloader");
startActivity(i);
// toaster("Please wait...");
[...]
downloader.java:
public class dowloader extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.downloader);
}
}
Androidmanifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="folder.hide.alexander.fuchs"
android:versionCode="3"
android:versionName="1.3.1" >
<uses-sdk android:minSdkVersion="8" />
<supports-screens
android:largeScreens="true"
android:normalScreens="true"
android:smallScreens="true"
android:resizeable="true"
android:anyDensity="true"
/>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".App"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".downloader" />
</application>
</manifest>
请帮助我,谢谢
Logcat:
02-14 14:07:42.539: E/AndroidRuntime(32755): FATAL EXCEPTION: main
02-14 14:07:42.539: E/AndroidRuntime(32755): android.content.ActivityNotFoundException: No Activity found to handle Intent { act=.downloader }
02-14 14:07:42.539: E/AndroidRuntime(32755): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1409)
02-14 14:07:42.539: E/AndroidRuntime(32755): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1379)
02-14 14:07:42.539: E/AndroidRuntime(32755): at android.app.Activity.startActivityForResult(Activity.java:2833)
02-14 14:07:42.539: E/AndroidRuntime(32755): at android.app.Activity.startActivity(Activity.java:2959)
02-14 14:07:42.539: E/AndroidRuntime(32755): at folder.hide.alexander.fuchs.App.onClick(App.java:333)
02-14 14:07:42.539: E/AndroidRuntime(32755): at android.view.View.performClick(View.java:2538)
02-14 14:07:42.539: E/AndroidRuntime(32755): at android.view.View$PerformClick.run(View.java:9152)
02-14 14:07:42.539: E/AndroidRuntime(32755): at android.os.Handler.handleCallback(Handler.java:587)
02-14 14:07:42.539: E/AndroidRuntime(32755): at android.os.Handler.dispatchMessage(Handler.java:92)
02-14 14:07:42.539: E/AndroidRuntime(32755): at android.os.Looper.loop(Looper.java:130)
02-14 14:07:42.539: E/AndroidRuntime(32755): at android.app.ActivityThread.main(ActivityThread.java:3691)
02-14 14:07:42.539: E/AndroidRuntime(32755): at java.lang.reflect.Method.invokeNative(Native Method)
02-14 14:07:42.539: E/AndroidRuntime(32755): at java.lang.reflect.Method.invoke(Method.java:507)
02-14 14:07:42.539: E/AndroidRuntime(32755): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:907)
02-14 14:07:42.539: E/AndroidRuntime(32755): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665)
02-14 14:07:42.539: E/AndroidRuntime(32755): at dalvik.system.NativeStart.main(Native Method)
像这样使用您的意图。
Intent intent = new Intent(yourCurrentClass.this,
nextClass.class);
startActivity(intent);
希望这可以帮助...
将此用于意图:
Intent in=new Intent(Hello.this,welcome.class);
startActivity(in);
如果您的类正在实现onClickListener(例如),则使用以下内容创建意图
Intent intent = new Intent(this, DestinationClassName.class);
startActivity(intent);
如果您将click事件侦听器作为匿名内部类提供,请使用以下命令
Intent intent = new Intent(CurrentClassName.this, DestinationClassName.class);
startActivity(intent);
Intent intent = new Intent(CurrentClass.this, downloader.class);
startActivity(intent);
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.