AlertDialog 实用API及其示例

API

常用方法

AlertDialog 创建

final AlertDialog.Builder builder = new AlertDialog.Builder(_mActivity);
builder.setCancelable(true);
final AlertDialog alert = builder.create();
alert.show();

设置宽满屏

Window dialogWindow = alert.getWindow();
WindowManager.LayoutParams p = dialogWindow.getAttributes();
p.width = WindowManager.LayoutParams.MATCH_PARENT; 
dialogWindow.setAttributes(p);

AlertDialog设置宽满屏时显示却有margin属性

alert.getWindow().setBackgroundDrawable(null);

设置居中

alert.getWindow().setGravity(Gravity.CENTER);

Alterdialog点击空白处不消失的方法

alert.setCanceledOnTouchOutside(false);

示例

默认普通对话框

AlertDialog dialog = new AlertDialog
                .Builder(this)
    .setTitle("普通对话框")
    .setIcon(R.mipmap.ic_launcher)
    .setNegativeButton("取消", null)
    .setPositiveButton("确定", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) { 
            Toast.makeText(getApplicationContext(), "确定", Toast.LENGTH_SHORT).show();
        }
    }).setNeutralButton("默认", null)
    .setMessage("确认删除？").create();
dialog.show();

显示Item对话框

final CharSequence[] items = {"北京", "上海", "广州"};
AlertDialog dialog = new AlertDialog
                .Builder(this)
    .setTitle("显示Item对话框")
    .setItems(items, new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            Toast.makeText(getApplicationContext(), items[which], Toast.LENGTH_SHORT).show();
        }
    }).create();
dialog.show();

单选列表对话框 setSingleChoiceItems

final CharSequence[] items = { "北京", "上海", "广州" };
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("请选择以下城市");
builder.setSingleChoiceItems(items, -1, new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        CharSequence sequence = items[which];
        Toast.makeText(getApplicationContext(), "select " + sequence, Toast.LENGTH_SHORT).show();
    }
});
AlertDialog dialog = builder.create();
dialog.show();

多选对话框setMultiChoiceItems

final CharSequence[] items = {"北京", "上海", "广州"};
AlertDialog dialog = new AlertDialog.Builder(this).setTitle("多选对话框").setIcon(android.R.drawable.sym_def_app_icon)
    .setNegativeButton("取消", null).setPositiveButton("确定", null)
    .setMultiChoiceItems(items, null, new DialogInterface.OnMultiChoiceClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which, boolean isChecked) {
            Toast.makeText(getApplicationContext(), "select " + items[which], Toast.LENGTH_SHORT).show();
        }
    }).create();
dialog.show();

自定义Adapter

final String[] items = {"北京", "上海", "广州"};
ArrayAdapter adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, items);
AlertDialog dialog = new AlertDialog.Builder(this).setTitle("自定义Adapter").setIcon(android.R.drawable.sym_def_app_icon)
    .setAdapter(adapter, new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            Toast.makeText(getApplicationContext(), "select " + items[which], Toast.LENGTH_SHORT).show();
        }
    }).create();
dialog.show();

自定义View

String name = "自定义View";
        View view = LayoutInflater.from(this).inflate(android.R.layout.simple_list_item_1, null);
        ((TextView)view.findViewById(android.R.id.text1)).setText(name);
        AlertDialog dialog = new AlertDialog
                .Builder(this)
                .setTitle(name)
                .setIcon(android.R.drawable.sym_def_app_icon)
                .setView(view)
                .create();
        dialog.show();