Question

我的应用程序中有两个警告对话框。

1用于退出应用程序，另一个用于重定向到url。

我在对话框中显示了对话框。

弹出的第一个对话框是重定向url，当用户按下它时会重定向到url。

但是当用户按下后退按钮时，我必须将其关闭，并且只想在后退按钮上单击时显示退出对话框。

这是我的代码。

boolean flag = false;

@Override
public void onBackPressed() {
    if (flag) {
        super.onBackPressed();

    } else {
        final AlertDialog.Builder alert = new AlertDialog.Builder(
                MainActivity.this);
        alert.setMessage("EXIT"); // Message
                                                                                // here

        alert.setPositiveButton("NO",
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog,
                            int whichButton) {
                        AlertDialog.Builder exitdialog = new AlertDialog.Builder(
                                MainActivity.this);
                        exitdialog
                                .setMessage("EXIT");
                        exitdialog.setTitle(R.string.app_name);
                        exitdialog.setIcon(R.drawable.logo);
                        exitdialog.setPositiveButton("NO",
                                new OnClickListener() {

                                    @Override
                                    public void onClick(
                                            DialogInterface dialog,
                                            int which) {

                                    }
                                });
                        exitdialog.setNegativeButton("Yes",
                                new OnClickListener() {

                                    @Override
                                    public void onClick(
                                            DialogInterface dialog,
                                            int which) {
                                        /*
                                         * Intent i=new
                                         * Intent(getApplicationContext
                                         * (),MainActivity.class);
                                         * startActivity(i);
                                         */

                                        finishFromChild(getParent());
                                        getIntent()
                                                .setFlags(
                                                        Intent.FLAG_ACTIVITY_CLEAR_TOP);
                                        finish();
                                    }
                                });
                        AlertDialog alertDialog = exitdialog.create();
                        alertDialog.show();

                    }
                });

        alert.setNegativeButton("YES",
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog,
                            int whichButton) {

                        Intent viewTwitter = new Intent(
                                "android.intent.action.VIEW",
                                Uri.parse("URL"));
                        startActivity(viewTwitter);
                        overridePendingTransition(R.anim.fadein,
                                R.anim.fadeout);

                    }

                });
        final AlertDialog alertDialog = alert.create();
        alertDialog.show();

    }

Answer 1

删除finish();默认操作dismiss将dialog.dismiss();放在onClick方法

中

修改设置flag = true;

boolean flag = false; @Override public void onBackPressed() { if (flag) { super.onBackPressed(); } else { final AlertDialog.Builder alert = new AlertDialog.Builder( MainActivity.this); alert.setMessage("EXIT"); // Message // here alert.setPositiveButton("NO", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { AlertDialog.Builder exitdialog = new AlertDialog.Builder( MainActivity.this); exitdialog .setMessage("EXIT"); exitdialog.setTitle(R.string.app_name); exitdialog.setIcon(R.drawable.logo); exitdialog.setPositiveButton("NO", new OnClickListener() { @Override public void onClick( DialogInterface dialog, int which) { } }); exitdialog.setNegativeButton("Yes", new OnClickListener() { @Override public void onClick( DialogInterface dialog, int which) { /* * Intent i=new * Intent(getApplicationContext * (),MainActivity.class); * startActivity(i); */ finishFromChild(getParent()); getIntent() .setFlags( Intent.FLAG_ACTIVITY_CLEAR_TOP); finish(); } }); AlertDialog alertDialog = exitdialog.create(); alertDialog.show(); } }); alert.setNegativeButton("YES", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { flag= true; Intent viewTwitter = new Intent( "android.intent.action.VIEW", Uri.parse("URL")); startActivity(viewTwitter); overridePendingTransition(R.anim.fadein, R.anim.fadeout); } }); final AlertDialog alertDialog = alert.create(); alertDialog.show(); }

当点击是按钮时如何解除alertdialog并且不再显示onBackPressed？

1 个答案: