Dialog

对话框

对话框是一个部分透明的浮动的Activity或者Fragment，它会部分的遮挡启动它的UI。对话框通常使用一个模糊层或模糊的过滤器来遮挡它后面的Activity。

一般对话框

DialogInterface.OnClickListener dialogOnClickListener = new DialogInterface.OnClickListener() { // 设置按钮监听        @Override        public void onClick(DialogInterface dialog, int which) {            switch (which) {            case Dialog.BUTTON_POSITIVE:                Toast.makeText(MainActivity.this, "确认" + which,                        Toast.LENGTH_SHORT).show();                break;            case Dialog.BUTTON_NEGATIVE:                Toast.makeText(MainActivity.this, "取消" + which,                        Toast.LENGTH_SHORT).show();                break;            case Dialog.BUTTON_NEUTRAL:                Toast.makeText(MainActivity.this, "忽略" + which,                        Toast.LENGTH_SHORT).show();                break;            }            dialog.dismiss(); // 关闭dialog        }    };    AlertDialog.Builder builder = new AlertDialog.Builder(this);    builder.setTitle("我是标题");// 设置标题    builder.setMessage("是否确认退出?"); // 设置内容    builder.setIcon(R.drawable.ic_launcher);// 设置图标，图片id即可    builder.setPositiveButton("确认", dialogOnClickListener);    builder.setNegativeButton("取消", dialogOnClickListener);    builder.setNeutralButton("忽略", dialogOnClickListener);    // 参数都设置完成了，创建并显示出来    builder.create().show();

列表对话框

final String items[] = { "张三", "李四", "王五" };    // dialog参数设置    AlertDialog.Builder builder = new AlertDialog.Builder(this); // 先得到构造器    builder.setTitle("提示"); // 设置标题    // builder.setMessage("是否确认退出?"); //设置内容    builder.setIcon(R.drawable.ic_launcher);// 设置图标，图片id即可    // 设置列表显示，注意设置了列表显示就不要设置builder.setMessage()了，否则列表不起作用。    builder.setItems(items, new DialogInterface.OnClickListener() {        @Override        public void onClick(DialogInterface dialog, int which) {            dialog.dismiss();            Toast.makeText(MainActivity.this, items[which],                    Toast.LENGTH_SHORT).show();        }    });    builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {        @Override        public void onClick(DialogInterface dialog, int which) {            dialog.dismiss();            Toast.makeText(MainActivity.this, "确定", Toast.LENGTH_SHORT)                    .show();        }    });    builder.create().show();

单选对话框

final String items[] = { "男", "女" };    AlertDialog.Builder builder = new AlertDialog.Builder(this); // 先得到构造器    builder.setTitle("提示"); // 设置标题    builder.setIcon(R.drawable.ic_launcher);// 设置图标，图片id即可    builder.setSingleChoiceItems(items, 0,            new DialogInterface.OnClickListener() {                @Override                public void onClick(DialogInterface dialog, int which) {                    // dialog.dismiss();                    Toast.makeText(MainActivity.this, items[which],                            Toast.LENGTH_SHORT).show();                }            });    builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {        @Override        public void onClick(DialogInterface dialog, int which) {            dialog.dismiss();            Toast.makeText(MainActivity.this, "确定", Toast.LENGTH_SHORT)                    .show();        }    });    builder.create().show();

多选对话框

final String items[] = { "篮球", "足球", "排球" };    final boolean selected[] = { true, false, true };    AlertDialog.Builder builder = new AlertDialog.Builder(this); // 先得到构造器    builder.setTitle("提示"); // 设置标题    builder.setIcon(R.drawable.ic_launcher);// 设置图标，图片id即可    builder.setMultiChoiceItems(items, selected,            new DialogInterface.OnMultiChoiceClickListener() {                @Override                public void onClick(DialogInterface dialog, int which,                        boolean isChecked) {                    // dialog.dismiss();                    Toast.makeText(MainActivity.this,                            items[which] + isChecked, Toast.LENGTH_SHORT)                            .show();                }            });    builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {        @Override        public void onClick(DialogInterface dialog, int which) {            dialog.dismiss();            Toast.makeText(MainActivity.this, "确定", Toast.LENGTH_SHORT)                    .show();            // android会自动根据你选择的改变selected数组的值。            for (int i = 0; i < selected.length; i++) {                Log.e("hongliang", "" + selected[i]);            }        }    });    builder.create().show();

自定义对话框

1. 新建一个类继承AlertDialog,并重写它的构造方法和onCreate方法

   public class CustomerDialog extends AlertDialog {

   private Context context;

   protected CustomerDialog(Context context) {
   super(context);
   this.context = context;
   }
   protected CustomerDialog(Context context,int theme) {
   super(context,theme);
   this.context = context;
   }

   @Override
   protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   this.setContentView(R.layout.dailog_view);
   }
   }

2. 在style文件中添加一个自定义的对话框style

   <style name="MyDialog" parent="@android:Theme.Dialog">             <item name="android:windowFrame">@null</item>            <item name="android:windowNoTitle">true</item>              <item name="android:windowBackground">@android:color/white</item>             <item name="android:windowIsFloating">true</item>             <item name="android:windowContentOverlay">@null</item>    </style> 

3. layout中自定义一个对话框布局

4. Activity中实例化对话框

   Dialog dialog = new CustomerDialog(this, R.style.MyDialog);dialog.show();