对话框详解2
作者:互联网
本文演示了如何创建一个悬浮对话框,即将activity以对话框的方式显示。
只要指定Activity的主题是dialog即可:
android:theme="@android:style/Theme.Dialog"
对于onTouchEvent方法:1、悬浮对话框(Activity) 单击屏幕上的任意地方都会触发
2、对话框 要想使用对话框的onTouchEvent方法。则必须继承AlertDialog类
本例先进入的是一个悬浮对话框(Activity),单击显示日期后弹出对话框,由于该对话框实现了AlertDialog的onTouchEvent方法,所以单击任意位置,对话框都会消失。
布局文件:
<?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"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:text="这是一个悬浮对话框" />
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginTop="20dp"
android:gravity="center"
android:orientation="horizontal" >
<Button
android:id="@+id/btnCurrentDate"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:text="当前日期" />
<Button
android:id="@+id/btnFinish"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:text="关闭" />
</LinearLayout>
</LinearLayout>
弹出对话框实现onTouchEvent:
public class DateDialog extends AlertDialog
{
public DateDialog(Context context)
{
super(context);
}
@Override
public boolean onTouchEvent(MotionEvent event)
{
dismiss();
return super.onTouchEvent(event);
}
}
public class Main extends Activity implements android.view.View.OnClickListener {
private DateDialog dateDialog;
public void onClick(View view) {
switch (view.getId()) {
case R.id.btnCurrentDate:
SimpleDateFormat simpleDateFormat = new SimpleDateFormat(
"yyyy-MM-dd");
dateDialog.setIcon(R.drawable.date);
dateDialog.setTitle("当前日期:" + simpleDateFormat.format(new Date()));
dateDialog.setButton("确定", new OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
//
}
});
dateDialog.setOnDismissListener(new OnDismissListener() {
public void onDismiss(DialogInterface dialog) {
new DateDialog.Builder(Main.this)
.setMessage("您已经关闭的当前对话框.").create().show();
}
});
dateDialog.show();
break;
case R.id.btnFinish:
finish();
break;
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
finish();
return true;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button btnCurrentDate = (Button) findViewById(R.id.btnCurrentDate);
Button btnFinish = (Button) findViewById(R.id.btnFinish);
btnCurrentDate.setOnClickListener(this);
btnFinish.setOnClickListener(this);
dateDialog = new DateDialog(this);
}
}
标签:DateDialog,dateDialog,对话框,onTouchEvent,详解,new,public 来源: https://blog.51cto.com/u_9894631/2789285