使用系统自带的dialog如果不能满足我们日常开发的需求,那就得自己构建custom dialog,特别是对于一个app来说,统一的样式风格会给人一种舒服的感觉,所以dialog的样式 、色调一般都要和app主题符合,这篇博客主要介绍两种方式来自定义dialog。
MainActivity的代码
package com.example.e01_consumerdialog; import android.os.Bundle; import android.app.Activity; import android.app.AlertDialog; import android.app.AlertDialog.Builder; import android.content.DialogInterface; import android.content.DialogInterface.OnClickListener; import android.view.LayoutInflater; import android.view.Menu; import android.view.View; import android.widget.Button; public class MainActivity extends Activity { private Button button; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); button=(Button)this.findViewById(R.id.button1); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub AlertDialog.Builder builder=new Builder(MainActivity.this); builder.setTitle("登陆界面"); View view=LayoutInflater.from(MainActivity.this).inflate(R.layout.dialog, null); builder.setView(view);//设置自定义布局view builder.setPositiveButton("确认", new OnClickListener() { @Override public void onClick(DialogInterface arg0, int arg1) { // TODO Auto-generated method stub } }); builder.setNegativeButton("取消",new OnClickListener() { @Override public void onClick(DialogInterface arg0, int arg1) { // TODO Auto-generated method stub } }); builder.show(); } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } }
dialog.xml的布局文件
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" > <TextView android:id="@+id/textView2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/editText1" android:layout_marginTop="27dp" android:layout_toLeftOf="@+id/editText1" android:text="密 码:" /> <EditText android:id="@+id/editText2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/textView2" android:layout_alignBottom="@+id/textView2" android:layout_alignLeft="@+id/editText1" android:layout_alignRight="@+id/editText1" android:ems="10" android:inputType="textPassword" /> <EditText android:id="@+id/editText1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/textView1" android:layout_alignBottom="@+id/textView1" android:layout_toRightOf="@+id/textView1" android:ems="10" /> <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:text="用户名:" /> </RelativeLayout>
以上的自定义dialog是模拟实现了一个登陆框选项的功能,但缺点也比较明显,按钮必须还得使用dialog本身的 PositiveButton这种风格,那有没有使我们的权限更大一点的自定义方法呢,从官方API我们可以看到
Tip: If you want a custom dialog, you can instead display an Activity
as
a dialog instead of using the Dialog
APIs.
Simply create an activity and set its theme to Theme.Holo.Dialog
in
the <activity>
manifest
element:
<activity android:theme="@android:style/Theme.Holo.Dialog" >
That‘s it. The activity now displays in a dialog window instead of fullscreen.
上面的tip告诉我们如果想自定义dialog,还可以把自己做的activity在清单文件中添加dialog属性,以此实现dialog形式的出现效果!