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Toast
A toast notification is a message that pops up on the surface of the window.
Toast waitToast = Toast.makeText(getApplicationContext(), "Please wait...", Toast.LENGTH_LONG);
waitToast.setGravity(Gravity.TOP, 0, 0);
waitToast.show();
AlertDialog
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setMessage("Are you sure you want to exit?")
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
MyActivity.this.finish();
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.create();
alert.show();
AlertDialog with a List
final CharSequence[] items = {"Red", "Green", "Blue"};
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle("Pick a color");
builder.setItems(items, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int item) {
String choice = items[item];
//DO SOMETHING WITH USER CHOICE
}
});
AlertDialog alert = builder.create();
alert.show();
Creating Custom Dialog using layout XML file
As a developer you can also create customized alert dialogs.
Step 1 – Creating the Dialog XML
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent" android:layout_height="fill_parent">
<EditText android:text="" android:id="@+id/EditText01"
android:layout_width="match_parent"
android:layout_height="wrap_content"></EditText>
</LinearLayout>
* The dialog layout xml file is placed together with all the layout xml files under <project_path>/res/layouts
Step 2 – Using it in code (implemented in the activity)
AlertDialog.Builder alt_bld = new AlertDialog.Builder(this);
LayoutInflater factory = LayoutInflater.from(this);
final View textEntryView = factory.inflate(R.layout.input, null);
alt_bld.setView(textEntryView).setCancelable(true).setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
}).setPositiveButton("OK",myOnClickListener);
AlertDialog alert = alt_bld.create();
alert.setTitle(title);
alert.setIcon(R.drawable.icon);
alert.show();
