从不同的类调用活动类的startActivity(覆盖)

Question

我有Target.java(它是主要的活动)和Layout.java.当用户单击按钮时,会打开一个URL.按钮单击在Layout.java中处理.

    deleteButton.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
             DebugLog.LOGD("Within onClick event of 'GO' button ");
            Target.openURL();

        }
    });

Target.java有一个静态函数openURL

    public static void openURL() {
     Uri uri = Uri.parse("http://www.thecinema.in");
     Intent intent = new Intent(Intent.ACTION_VIEW, uri);
     startActivity(intent);

     }

我想知道如何使这段代码工作,因为我现在得到的错误是" 无法从类型Activity中对非静态方法startActivity(Intent)进行静态引用".我可以理解startActivity在静态函数中不起作用,但请建议我如何实现目标..我是android.FYI的新手..谢谢你们

- 更新的代码: Layout.java

    deleteButton.setOnClickListener(new View.OnClickListener() {
      public void onClick(View v) {
             DebugLog.LOGD("Within onClick event of 'GO' button ");
            Target iA = new Target();
            iA.openURL();


        }
    });

Target.java

     public void openURL() {    //removed static keyword
     DebugLog.LOGD("Within nDelete event of GO button ");

     Uri uri = Uri.parse("http://www.thecinema.in");
     Intent intent = new Intent(Intent.ACTION_VIEW, uri);
     intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
     startActivity(intent);

 }

抛出异常:

    03-02 10:10:28.351: D/QCAR(6820): Within onClick event of 'GO' button 
    03-02 10:10:28.351: W/dalvikvm(6820): threadid=1: thread exiting with uncaught exception (group=0x400207d8)
    03-02 10:10:28.361: E/AndroidRuntime(6820): FATAL EXCEPTION: main
    03-02 10:10:28.361: E/AndroidRuntime(6820): java.lang.NullPointerException
    03-02 10:10:28.361: E/AndroidRuntime(6820):     at android.app.Activity.startActivityForResult(Activity.java:2817)
    03-02 10:10:28.361: E/AndroidRuntime(6820):     at android.app.Activity.startActivity(Activity.java:2923)
    03-02 10:10:28.361: E/AndroidRuntime(6820):     at com.ingage.pocs.phonegap.Layout$4.onClick(Layout.java:124)
    03-02 10:10:28.361: E/AndroidRuntime(6820):     at android.view.View.performClick(View.java:2408)
    03-02 10:10:28.361: E/AndroidRuntime(6820):     at android.view.View$PerformClick.run(View.java:8816)
    03-02 10:10:28.361: E/AndroidRuntime(6820):     at android.os.Handler.handleCallback(Handler.java:587)
    03-02 10:10:28.361: E/AndroidRuntime(6820):     at  android.os.Handler.dispatchMessage(Handler.java:92)
    03-02 10:10:28.361: E/AndroidRuntime(6820):     at android.os.Looper.loop(Looper.java:123)
    03-02 10:10:28.361: E/AndroidRuntime(6820):     at android.app.ActivityThread.main(ActivityThread.java:4633)

伙计们这里出了什么问题..

Answer 1

我能够为这个问题找到解决方案.在Tar​​get.java下,我创建了openURL():

     public void openURL(Context context) 
    {
     Intent intent = new Intent("com.ingage.pocs.phonegap.URL");
     intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
     context.startActivity(intent);
     }

我创建了一个新的Activity OpenURL.java,并将意图"com.ingage.pocs.phonegap.URL"与它相关联:

    package com.ingage.pocs.phonegap;

    import android.app.Activity;
    import android.content.Intent;
    import android.net.Uri;
    import android.os.Bundle;

    public class OpenURL extends Activity{

        @Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    DebugLog.LOGD("Within BookTicketsActivity Activity GO button ");

    Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.thecinema.in"));
    startActivity(browserIntent);

}

}

Layout.java:

    private Context applicationContext;

    deleteButton.setOnClickListener(new View.OnClickListener() {
      public void onClick(View v) {
         DebugLog.LOGD("Within onClick event of 'GO' button ");
        ImageTargets ia =new ImageTargets();
             ia.openURL(applicationContext);
        iA.openURL();


    }
});

最好的是,它工作:)如果你们想出一个更好或更明智的解决方案,请发布在这里.谢谢你