从 onPostExecute() 开始新活动

Question

我想从 post execute 开始另一个 Activity 并向它传递一些参数。但它强制关闭应用程序。这是我的onPostExecute()：

@Override
protected void onPostExecute(Bitmap result) {
    super.onPostExecute(result);
    if (result != null) {
        imageView.setImageBitmap(result);
        imageView.setOnClickListener(new OnClickListener(){
            public void onClick(View view) {
                Toast.makeText(context, ""+captionStr, Toast.LENGTH_LONG).show();
                Intent intent = new Intent(context, Article.class);
                Bundle b = new Bundle();
                b.putString("url", "Hello"); //Your id
                intent.putExtras(b); //Put your id to your next Intent
                context.startActivity(intent);
                // context.finish();*/
            }
        });
    } else {
        imageView.setImageResource(R.drawable.ic_launcher);
    }
}

我的清单声明

<activity android:name=".com.tdodemo.tdo.Article" />

日志猫

09-04 10:53:30.759: E/AndroidRuntime(15546): FATAL EXCEPTION: main
09-04 10:53:30.759: E/AndroidRuntime(15546): Process: com.tdodemo.tdo, PID: 15546
09-04 10:53:30.759: E/AndroidRuntime(15546): android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity  context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?
09-04 10:53:30.759: E/AndroidRuntime(15546):    at android.app.ContextImpl.startActivity(ContextImpl.java:1146)
09-04 10:53:30.759: E/AndroidRuntime(15546):    at android.app.ContextImpl.startActivity(ContextImpl.java:1133)
09-04 10:53:30.759: E/AndroidRuntime(15546):    at android.content.ContextWrapper.startActivity(ContextWrapper.java:328)
09-04 10:53:30.759: E/AndroidRuntime(15546):    at com.tdodemo.tdo.ImageLoadTask$1.onClick(ImageLoadTask.java:82)
09-04 10:53:30.759: E/AndroidRuntime(15546):    at android.view.View.performClick(View.java:4562)
09-04 10:53:30.759: E/AndroidRuntime(15546):    at android.view.View$PerformClick.run(View.java:18918)
09-04 10:53:30.759: E/AndroidRuntime(15546):    at android.os.Handler.handleCallback(Handler.java:808)
09-04 10:53:30.759: E/AndroidRuntime(15546):    at android.os.Handler.dispatchMessage(Handler.java:103)
09-04 10:53:30.759: E/AndroidRuntime(15546):    at android.os.Looper.loop(Looper.java:193)
09-04 10:53:30.759: E/AndroidRuntime(15546):    at android.app.ActivityThread.main(ActivityThread.java:5388)
09-04 10:53:30.759: E/AndroidRuntime(15546):    at java.lang.reflect.Method.invokeNative(Native Method)
09-04 10:53:30.759: E/AndroidRuntime(15546):    at java.lang.reflect.Method.invoke(Method.java:515)
09-04 10:53:30.759: E/AndroidRuntime(15546):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
09-04 10:53:30.759: E/AndroidRuntime(15546):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:655)
09-04 10:53:30.759: E/AndroidRuntime(15546):    at dalvik.system.NativeStart.main(Native Method)

Answer 1

你需要添加标志intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

Intent intent = new Intent(context, Article.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
Bundle b = new Bundle();
b.putString("url", "Hello"); //Your id
intent.putExtras(b); //Put your id to your next Intent
context.startActivity(intent);  

Answer 2

试试这样的：

Intent intent_name = new Intent();
intent_name.setClass(getApplicationContext(),Article.class);
Bundle b = new Bundle();
b.putString("url", "Hello"); //Your id
intent_name.putExtras(b);
startActivity(intent_name);

或

由于 AsyncTask 的参数之一是您可以直接使用的活动

Intent intent_name = new Intent(activity, Article.class);
Bundle b = new Bundle();
b.putString("url", "Hello"); //Your id
intent_name.putExtras(b);
activity.startActivity();

希望对您有所帮助！

Answer 3

尝试使用您的活动名称。

Intent intent = new Intent(YOUR ACTIIVITY NAME.this , Article.class);
startActivity(intent);

Answer 4

通过查看您的 logcat，它说明了所需的标志。通过在您的意图中添加该标志来尝试

 intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

Answer 5

试试 tis 代码，它对我有用

@Override
        protected void onPostExecute(Void result) 
        {
            super.onPostExecute(result);
            Intent intent = new Intent(MyAsyncTaskActivity.this, NextActivity.class);
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
            Context().startActivity(intent);
        }

Answer 6

试试这个，移动这个

    imageView.setImageBitmap(result);
    imageView.setOnClickListener(new OnClickListener(){

        public void onClick(View view) {

            Toast.makeText(context, ""+captionStr, Toast.LENGTH_LONG).show();
            Intent intent = new Intent(context, Article.class);
            Bundle b = new Bundle();
            b.putString("url", "Hello"); //Your id
            intent.putExtras(b); //Put your id to your next Intent
            context.startActivity(intent);
            // context.finish();*/
        }
    });`

在 onPostExecute 之外，在您调用 asyncTask 类后进入您的主要活动。 onPostExecute 保存图片到drawable目录，把你的imageView改成
imageView.setImageBitmap(res.drawable.Image);