Alert message is not displaying in alert dialog box?

问题

I want to display the alert dialog box to device screen size. I got the solution through this link How to make an alert dialog fill 90% of screen size? I use the solution given there, it works just fine but my alert message is displaying in very small size. we can't even make out the message in landscape orientation. I have used the following code.

AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage(R.string.app_description).setPositiveButton(
                    "Ok", new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int id) {
                            dialog.dismiss();
                        }
                    });
            builder.Title(title);

            Dialog d = builder.setView(new View(this)).create();
            WindowManager.LayoutParams lp = new WindowManager.LayoutParams();
            lp.copyFrom(d.getWindow().getAttributes());
            lp.width = WindowManager.LayoutParams.FILL_PARENT;
            lp.height = WindowManager.LayoutParams.FILL_PARENT;
            d.show();
            d.getWindow().setAttributes(lp);

How to set the message, so that it will properly display in the dialog window?

Thanks in advance Pushpa

回答1:

Check this code and tell me if that's what you really wanted to achieve ?.

 AlertDialog.Builder builder = new AlertDialog.Builder(this);

    // Creates textview
    TextView text = new TextView(this);  
    text.setText("Hello This text");  
    text.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
    text.setTextSize(20);        
    text.setGravity(Gravity.CENTER);

    //Creates a linearlayout layout and sets it with initial params
    LinearLayout ll = new LinearLayout(this);
    ll.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
    ll.setGravity(Gravity.CENTER);
    ll.addView(text);  //adds textview to llayout

    builder.setMessage("Title").setPositiveButton(
            "Ok", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    dialog.dismiss();
                }
            }); 

    Dialog d = builder.setView(ll).create();   

    //Fills up the entire Screen
    WindowManager.LayoutParams lp = new WindowManager.LayoutParams();
    lp.copyFrom(d.getWindow().getAttributes());
    lp.width = WindowManager.LayoutParams.FILL_PARENT;
    lp.height = WindowManager.LayoutParams.FILL_PARENT;
    d.show();
    d.getWindow().setAttributes(lp);

回答2:

By the default implement-ion you can't set the text size. you can do one simple thing. wirte a XML and inflate that XML and pass to builder view.

   builder.setView(view)  

nothing but you are setting a view to dialog. and that view will handle all the touches. and you can specify height and width of the views in xml including text size.

来源：https://stackoverflow.com/questions/10432184/alert-message-is-not-displaying-in-alert-dialog-box