MainActivity如下:
package cn.testalertdialog;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.content.Context;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
/**
* Demo说明:
*
* 自定义Dialog的使用
*
* 1 在屏幕中显示自定义Dialog.
* 其中按照屏幕大小设置Dialog的显示大小
*
* 2 在屏幕底部显示自定义Dialog.
* 网上有许多资料都有一个缺陷:Dialog距离屏幕底部总有几毫米的间隙.
* 试过许多方法和style都不管用.在此给出一个可行的办法.详见代码.
* 3 本示例采用API 15即 4.0.3
*
* http://blog.csdn.net/lfdfhl
*
*/
public class MainActivity extends Activity {
private Button mButton;
private Dialog mDialog;
private AlertDialog mAlertDialog;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
init();
}
private void init(){
mButton=(Button) findViewById(R.id.button);
mButton.setOnClickListener(new ButtonOnClickListenerImpl());
}
private class ButtonOnClickListenerImpl implements OnClickListener {
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.button:
showDialog(MainActivity.this);
//showDialogAtScreenBottom(MainActivity.this);
break;
default:
break;
}
}
}
//显示自定义Dialog
private void showDialog(Context context) {
LayoutInflater inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
View dialogView = inflater.inflate(R.layout.dialogview, null);
mDialog = new Dialog(context, R.style.dialog);
mDialog.setContentView(dialogView);
Window dialogWindow = mDialog.getWindow();
// 获取对话框当前的参数值
WindowManager.LayoutParams layoutParams = dialogWindow.getAttributes();
// 设置对话框高度为屏幕高度的0.3倍
layoutParams.height = (int) (getScreenHeight(context) * 0.3);
// 设置对话框宽度为屏幕宽度的0.7倍
layoutParams.width = (int) (getScreenWidth(context) * 0.7);
dialogWindow.setAttributes(layoutParams);
mDialog.show();
initDialog(dialogView);
}
//在屏幕底部显示自定义Dialog
private void showDialogAtScreenBottom(Context context) {
LayoutInflater inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
View dialogView = inflater.inflate(R.layout.dialogview, null);
mAlertDialog = new AlertDialog.Builder(context, R.style.dialog).create();
mAlertDialog.show();
Window window = mAlertDialog.getWindow();
// 将Dialog显示到屏幕的底部
window.setGravity(Gravity.BOTTOM);
// 去掉Dialog本身的padding
window.getDecorView().setPadding(0, 0, 0, 0);
WindowManager.LayoutParams layoutParams = mAlertDialog.getWindow().getAttributes();
// 设置宽度为屏幕宽度
layoutParams.width = getScreenWidth(context);
mAlertDialog.getWindow().setAttributes(layoutParams);
mAlertDialog.setContentView(dialogView);
initAlertDialog(dialogView);
}
//初始化自定义布局中的控件
private void initDialog(View dialogView){
Button firstButton=(Button) dialogView.findViewById(R.id.dialog_firstButton);
firstButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
System.out.println("点击确定");
}
});
Button secondButton=(Button) dialogView.findViewById(R.id.dialog_secondButton);
secondButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (mDialog!=null&&mDialog.isShowing()) {
mDialog.dismiss();
}
}
});
}
//初始化自定义布局中的控件
private void initAlertDialog(View dialogView) {
Button firstButton = (Button) dialogView.findViewById(R.id.dialog_firstButton);
firstButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
System.out.println("点击确定");
}
});
Button secondButton = (Button) dialogView.findViewById(R.id.dialog_secondButton);
secondButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (mAlertDialog != null && mAlertDialog.isShowing()) {
mAlertDialog.dismiss();
}
}
});
}
/**
* 获得屏幕高度
*/
public static int getScreenWidth(Context context) {
WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
DisplayMetrics outMetrics = new DisplayMetrics();
wm.getDefaultDisplay().getMetrics(outMetrics);
return outMetrics.widthPixels;
}
/**
* 获得屏幕宽度
*/
public static int getScreenHeight(Context context) {
WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
DisplayMetrics outMetrics = new DisplayMetrics();
wm.getDefaultDisplay().getMetrics(outMetrics);
return outMetrics.heightPixels;
}
}
main.xml如下:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button_tip"
android:textSize="20sp"
android:layout_centerInParent="true"
/>
</RelativeLayout>
dialogview.xml如下:
<?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:background="@android:color/white"
android:padding="50px"
android:orientation="vertical" >
<Button
android:id="@+id/dialog_firstButton"
android:layout_width="200dip"
android:layout_height="50dip"
android:layout_gravity="center_horizontal"
android:layout_marginTop="50px"
android:background="@android:color/holo_blue_dark"
android:text=" 确 定 " />
<Button
android:id="@+id/dialog_secondButton"
android:layout_width="200dip"
android:layout_height="50dip"
android:layout_gravity="center_horizontal"
android:layout_marginTop="50px"
android:background="@android:color/holo_blue_dark"
android:text=" 取 消 " />
</LinearLayout>
style如下:
<style name="dialog" parent="@android:style/Theme.Dialog">
<item name="android:windowFrame">@null</item>
<item name="android:windowIsFloating">true</item>
<item name="android:windowIsTranslucent">true</item>
<item name="android:windowNoTitle">true</item>
<item name="android:windowBackground">@android:color/transparent</item>
<item name="android:backgroundDimEnabled">true</item>
<item name="android:windowContentOverlay">@null</item>
</style>
