Android 有没有办法在AsyncTask中显示AlertDialog？

我想显示AsyncTask中其他类中的AlertDialog。 示例>

我想g_ctx.class.runonuiThread。。。但我不能打电话给runonuithread

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如何解决它？

您可以使用处理程序在主线程中调用它

    new Handler(Looper.getMainLooper()).post(new Runnable() {
        @Override
        public void run() {
             // Your code here
        }
    });

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活动类中存在runOnUiThread方法。所以你应该把活动传给你的班级。 例如：

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致电Context.runonuithread.Related:谢谢！！你节省了我的时间！！！这对我很好。我只是想知道这是否是关于活动的“从不调用错误…”？？cuiz我正在将Toast更改为AlertDialog。。。在自定义Toast msg=消息之前；runOnUiThreadnew Runnable{@Override public void run{View View View=View.inflateForm_Main.this，R.layout.common_toast，null；TextView tv=TextView View View.findviewbydr.id.TextView toast；tv.setTextmsg；toast t=new toast_context；t.setview；t.setDurationToast.LENGTH_LONG；t.setGravityGravity.CENTER，0；t.show；}；@Adrian在这种情况下，只有当activity为null时，才会出现错误，所以您还应该在方法顶部检查activity if为null。谢谢！！这对我来说太完美了。我解决了我的问题！

    Context g_ctx;
String g_content;
public void ez_ConfirmAlertDialog(Context ctx, String content) {
    this.g_ctx=ctx;
    this.g_content=content;

    runOnUiThread(new Runnable() {
        @Override
        public void run() {
            AlertDialog.Builder builder = new AlertDialog.Builder(g_ctx, AlertDialog.THEME_HOLO_LIGHT);
            builder.setMessage(g_content).setPositiveButton(getString(R.string.kor_confirm),
                    new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int whichButton) {

                        }
                    });

            AlertDialog alertDialog = builder.create();
            alertDialog.show();
            alertDialog.getWindow().setLayout(displayWidth / 2, LayoutParams.WRAP_CONTENT);
            alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).setTextColor(Color.rgb(10, 174, 239));

        }
    });

}

    new Handler(Looper.getMainLooper()).post(new Runnable() {
        @Override
        public void run() {
             // Your code here
        }
    });

public class MyClass{


public void ez_ConfirmAlertDialog(Activity activity, String content) {
    this.g_ctx=ctx;
    this.g_content=content;

    if(activity == null){
       return;
    }

    activity.runOnUiThread(new Runnable() {
        @Override
        public void run() {
            AlertDialog.Builder builder = new AlertDialog.Builder(g_ctx, AlertDialog.THEME_HOLO_LIGHT);
            builder.setMessage(g_content).setPositiveButton(getString(R.string.kor_confirm),
                    new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int whichButton) {

                        }
                    });

            AlertDialog alertDialog = builder.create();
            alertDialog.show();
            alertDialog.getWindow().setLayout(displayWidth / 2, LayoutParams.WRAP_CONTENT);
            alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).setTextColor(Color.rgb(10, 174, 239));

        }
    });

}

}