对话框 Android Dialog
1、Dialog介绍
2、AlertDialog的基本使用
3、自定义对话框 Custom Dialog
Dialog也是Android中常用的用户界面元素,他同Menu一样也不是View的子类。让我们看一下它的继承关系:
<?xml version="1.0" encoding="utf-8"?>
<linearlayout android:layout_height="fill_parent" android:layout_width="fill_parent" android:orientation="vertical" xmlns:android="http://schemas.android.com/apk/res/android">
<textview android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/TextView01" android:text="对话框示例" android:textsize="20sp" android:layout_margintop="5dp">
</textview>
<button android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/Button01" android:text="显示对话框|ShowDialog()" android:textsize="20sp" android:layout_margintop="5dp">
</button>
<button android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/Button02" android:text="关闭对话框|dismissDialog()" android:textsize="20sp" android:layout_margintop="5dp">
</button>
<button android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/Button03" android:text="移除对话框|removeDialog()" android:textsize="20sp" android:layout_margintop="5dp">
</button>
</linearlayout>
package android.basic.lesson17;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class MainHelloAlertDialog extends Activity {
//定义一个对话框的ID
int Edward_Movie_Dialog = 1;
// 对话框按钮点击事件监听器
OnClickListener ocl = new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
switch (which) {
case Dialog.BUTTON_NEGATIVE:
Toast.makeText(MainHelloAlertDialog.this, "我不喜欢他的电影。",
Toast.LENGTH_LONG).show();
break;
case Dialog.BUTTON_NEUTRAL:
Toast.makeText(MainHelloAlertDialog.this, "说不上喜欢不喜欢。",
Toast.LENGTH_LONG).show();
break;
case Dialog.BUTTON_POSITIVE:
Toast.makeText(MainHelloAlertDialog.this, "我很喜欢他的电影。",
Toast.LENGTH_LONG).show();
break;
}
}
};
@Override
/** Called when the activity is first created. */
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// 定义对话框对象
Dialog dialog = new AlertDialog.Builder(this)
.setIcon(android.R.drawable.btn_star).setTitle("喜好调查")
.setMessage("你喜欢看爱德华.诺顿Edward Norton的电影吗?")
.setNegativeButton("不喜欢", ocl).setNeutralButton("一般般", ocl)
.setPositiveButton("很喜欢", ocl).create();
//显示对话框
dialog.show();
//定义 按钮 UI组件
Button b1 = (Button) findViewById(R.id.Button01);
Button b2 = (Button) findViewById(R.id.Button02);
Button b3 = (Button) findViewById(R.id.Button03);
//定义按钮的单击事件监听器
View.OnClickListener b_ocl= new View.OnClickListener() {
@Override
public void onClick(View v) {
switch(v.getId()){
case R.id.Button01:
//显示对话框
showDialog(Edward_Movie_Dialog);
break;
case R.id.Button02:
//关闭对话框 这个功能好傻X,根本点不到的按钮
dismissDialog(Edward_Movie_Dialog);
break;
case R.id.Button03:
//移除对话框 这个功能好傻X,根本点不到的按钮
removeDialog(Edward_Movie_Dialog);
break;
}
}
};
//绑定按钮监听器
b1.setOnClickListener(b_ocl);
b2.setOnClickListener(b_ocl);
b3.setOnClickListener(b_ocl);
}
// 创建会话框时调用
@Override
public Dialog onCreateDialog(int id) {
&nbs