Android简单例子——IpHone样式AlertDialog

此例子源于网络，下载下来之后，自己加了写注释，作为总结，发到博客中，谢谢原作者

通过这个例子学到的东西

1.自定义对话框的使用

2.程序中使用颜色如何进行存放，增加复用性

3.加深线性布局、常用控件的使用

1.实现效果

2.颜色值文件

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <drawable name="white">#FFFFFF</drawable> 
    <color name="White">#FFFFFF</color>
    <color name="Black">#000000</color>
    <color name="grey">#D7D4D4</color>
    <color name="red">#FF0000</color>
 
</resources>

3.第一个界面布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal|center_vertical"
    android:orientation="vertical">
    
    <LinearLayout
        android:orientation="vertical"
        android:background="@drawable/alert"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal"
        android:layout_marginLeft="20dip"
        android:layout_marginRight="20dip">
        
        <TextView android:id="@+id/dialog_title"
             android:layout_width="wrap_content" 
             android:layout_height="wrap_content"
             android:layout_marginTop="15dip"
             android:textColor="#ffffff"
             android:textStyle="bold"
             android:textSize="17sp" 
             android:text="About to call 323"/>
        
        <TextView android:id="@+id/dialog_message"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_margin="10dip"
             android:gravity="center_horizontal"
             android:textSize="15sp"
             android:textColor="#ffffff"
             android:text="Are you sure you want to proceed?" />

         <Button
             android:id="@+id/ok"
             android:layout_width="fill_parent"
             android:layout_height="40dip"
             android:layout_marginBottom="10dip"
             android:layout_marginLeft="10dip"
             android:layout_marginRight="10dip"
             android:background="@drawable/custom_button"
             android:textColor="@color/White"
             android:textSize="17sp"
             android:textStyle="bold" 
             android:text="OK"/>
    </LinearLayout>
</LinearLayout>

4.第二个界面的布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal|center_vertical"
    android:orientation="vertical">
    
    <LinearLayout
        android:orientation="vertical"
        android:background="@drawable/alert"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal"
        android:layout_marginLeft="20dip"
        android:layout_marginRight="20dip">
        
        <TextView android:id="@+id/dialog_title_2"
             android:layout_width="wrap_content" 
             android:layout_height="wrap_content"
             android:layout_marginTop="15dip"
             android:textColor="#ffffff"
             android:textStyle="bold"
             android:textSize="17sp" 
             android:text="About to call 323"/>
        
        <TextView android:id="@+id/dialog_message_2"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_margin="10dip"
             android:gravity="center_horizontal"
             android:textSize="15sp"
             android:textColor="#ffffff"
             android:text="Are you sure you want to proceed?" />
        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="10dip"
            android:layout_marginTop="10dip"
            android:gravity="center_horizontal"
            android:orientation="horizontal" >

            <Button
                android:id="@+id/cancel_2"
                android:layout_width="0dip"
                android:layout_height="40dip"
                android:layout_gravity="left"
                android:layout_marginLeft="10dip"
                android:layout_weight="1"
                android:background="@drawable/custom_button"
                android:text="取消"
                android:textColor="@color/White"
                android:textStyle="bold" />

            <Button
                android:id="@+id/ok_2"
                android:layout_width="0dip"
                android:layout_height="40dip"
                android:layout_marginBottom="10dip"
                android:layout_marginRight="10dip"
                android:layout_weight="1"
                android:background="@drawable/custom_button"
                android:text="确定"
                android:textColor="@color/White"
                android:textStyle="bold" />
        </LinearLayout>
    </LinearLayout>
</LinearLayout>

5.核心代码文件

public class MainActivity extends Activity {

    private Button btn;
    private Button btn2;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        btn = (Button) findViewById(R.id.btn1);
        
        /**增加监听事件**/
        btn.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View view) {
                // TODO Auto-generated method stub
                showCustomMessageOK("提示信息","不能进行此项操作");
            }

        });
        
        btn2 = (Button) findViewById(R.id.btn2);
        btn2.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                // TODO Auto-generated method stub
                showCustomMessageOKAndCancle("温馨提示","是否确认退出");
            }
        });
    }
    
    /**
     * 实现一个带有确定和取消按钮的对话框
     * @param title
     * @param message
     */
    protected void showCustomMessageOKAndCancle(String title, String message) {
        // TODO Auto-generated method stub
        
        /**
         * 创建一个Dialog对象，Dialog有两个构造法方法
         * 1.
         * 
         * 
         **/
        final Dialog dialog = new Dialog(MainActivity.this, android.R.style.Theme_Translucent_NoTitleBar);
        
        /**为Dialog加载布局文件**/
        dialog.setContentView(R.layout.ok_cancle_dialog_view);
        /**为设置相应的属性值**/
        ((TextView)dialog.findViewById(R.id.dialog_title_2)).setText(title);
        ((TextView)dialog.findViewById(R.id.dialog_message_2)).setText(message);
        ((Button) dialog.findViewById(R.id.cancel_2)).setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View view) {
                // TODO Auto-generated method stub
                dialog.dismiss();
            }
        });
        
        ((Button) dialog.findViewById(R.id.ok_2)).setOnClickListener(new OnClickListener() {
                
                @Override
                public void onClick(View view) {
                    // TODO Auto-generated method stub
                    MainActivity.this.finish();
                    System.exit(0);
                }
        });
        dialog.show();
    }
    /**
     * 创建一个只有确定按钮的对话框
     * @param title
     * @param message
     */
    private void showCustomMessageOK(String title, String message) {
        // TODO Auto-generated method stub
        final Dialog dialog = new Dialog(MainActivity.this, android.R.style.Theme_Translucent_NoTitleBar);
        dialog.setContentView(R.layout.ok_dialog_view);
        ((TextView) dialog.findViewById(R.id.dialog_title)).setText(title);
        ((TextView) dialog.findViewById(R.id.dialog_message)).setText(message);
        ((Button) dialog.findViewById(R.id.ok)).setText("OK");
        ((Button) dialog.findViewById(R.id.ok)).setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View view) {
                // TODO Auto-generated method stub
                dialog.dismiss();
            }
        });
        
        dialog.show();
    }
}

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