Question

我在一个包中创建了一个alertdialog类，我将其作为另一个类中的方法调用。我想要的是当用户点击alertdialog上的按钮时，它必须开始一项新活动。我不知道该怎么做请指导我。我是否需要在alertdialog类中创建一个方法，以便按钮执行操作，如果是这样的话。

Alertdialog.java

public class Alertdialog implements OnClickListener {
    private static final int ALERT_DIALOG = 1;
    int dialog;
    Dialog dialog1;
    Context dia;
    String st;
    Button bq;
    String a;

    public Alertdialog() {

    }

    @SuppressLint("NewApi")
    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public Dialog customalertdialog(Context dia, int id, String r, String a,
            String b, String b1) {
        // protected Dialog onCreateDialog( ){
        // this.dialog = ALERT_DIALOG;
        this.dia = dia;
        if (id == ALERT_DIALOG) {
            AlertDialog.Builder builder = new AlertDialog.Builder(dia,
                    R.style.MyTheme);
            AlertDialog alertDialog = builder.setPositiveButton(b, null)
                    .setNegativeButton(b1, null).setMessage(a).setTitle(r)
                    .create();
            DisplayMetrics metrics = alertDialog.getContext().getResources()
                    .getDisplayMetrics();
            final int width = metrics.widthPixels;
            alertDialog.setOnShowListener(new DialogInterface.OnShowListener() {

                @Override
                public void onShow(DialogInterface dialog) {
                    AlertDialog alertDialog = (AlertDialog) dialog;
                    View view = alertDialog.getWindow().getDecorView()
                            .findViewById(android.R.id.content);
                    FrameLayout.LayoutParams layoutParams = (FrameLayout.LayoutParams) view
                            .getLayoutParams();
                    layoutParams.width = 4 * width / 5; // 80% of screen
                    layoutParams.gravity = Gravity.CENTER;
                    view.setLayoutParams(layoutParams);
                    alertDialog.getWindow().setBackgroundDrawable(
                            new ColorDrawable(Color.TRANSPARENT));
                }
            });
            alertDialog.show();
            bq = alertDialog.getButton(DialogInterface.BUTTON_NEGATIVE);
            bq.setBackground(dia.getResources().getDrawable(
                    R.drawable.radibutton));
            Button bq1 = alertDialog.getButton(DialogInterface.BUTTON_POSITIVE);
            bq1.setBackground(dia.getResources().getDrawable(
                    R.drawable.radibutton));
            if (bq != null && bq1 != null) {
                bq.setHeight(75);
                bq1.setHeight(75);

            }

        }
        return dialog1;

    }

Answer 1

您需要从您调用Alertdialog类的活动中传递上下文，然后使用上下文来启动活动（意图）。

代码：...

public class Alertdialog implements OnClickListener {
private static final int ALERT_DIALOG = 1;
int dialog;
Dialog dialog1;
Context dia;
String st;
Button bq;
String a;

private Context context; //this line

public Alertdialog(Context context) {
   this.context = context //this line
}

.....

然后在你的BUTTON_POSITIVE中添加：

Intent i = new Intent(context, whereverYouWantToGo.class);
context.startActivity(i);

希望你有这个想法..给我一个反馈是否有效。

Answer 2

以下是调用活动的示例代码

Intent intent = new Intent(this, SelectCityActivity.class);
    intent.putExtra(Statics.INTENT_PARAM_CITY_SEARCH_TITLE,"Choose a city");
    intent.putExtra(Statics.INTENT_PARAM_CITY_SEARCH_SUB_TITLE,"where are you leaving from");
    startActivityForResult(intent, PICK_FROM_CITY_REQUEST);

Answer 3

请以简单的方式执行此操作。您将需要AlertDialogue，然后粘贴以下代码

    AlertDialog alert_back = new AlertDialog.Builder(CurrentClassName.this).create();
                    alert_back.setTitle("Alert Dialog Title");
                    alert_back.setMessage("Alert Dialog Message");

                    alert_back.setButton2("Go", new DialogInterface.OnClickListener() {

                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            Intent intent=new Intent(CurrentClassName.this,DestinationClassName.class);
                startActivity(intent);
dialog.dismiss();
                        }
                    });
                    alert_back.show();

如果您想这样做，那就很容易了。

试试这个并提供反馈。

如何在警告对话框中点击按钮启动新活动？

3 个答案: