AlertDialog的写法

public void onItemClick(AdapterView<?> parent, View view, int position,long id) {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("选项");
        builder.setItems(R.array.choice, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                switch(which) {
                case 0:
                    break;
                case 1:
                    break;
                case 2:
                    break;
                }
                
            }
        });
        builder.setNegativeButton("取消", null);
        builder.create().show();
        
    }

string.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="app_name">AppExplorer</string>
    <string name="hello_world">Hello world!</string>
    <array name ="choice">
        <item name="start">启动程序</item>
        <item name="detail">详细信息</item>
        <item name="uninstall">卸载</item>
    </array>
</resources>

效果：

public void onItemClick(AdapterView<?> parent, View view, int position,long id) {
        final PackageInfo tempPkgInfo = showPackageInfos.get(position);
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("选项");
        builder.setItems(R.array.choice, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                switch(which) {
                case 0:
                    String packageName = tempPkgInfo.packageName;
                    ActivityInfo[] activityInfo = tempPkgInfo.activities;
                    String activityName = activityInfo[0].name;
                    try {
                        Intent i = new Intent();
                        i.setComponent(new ComponentName(packageName, activityName));
                        startActivity(i);
                    } catch (Exception e) {
                        return;
                    }
                    break;
                case 1:
                    showAppDetail(tempPkgInfo);
                    break;
                case 2:
                    Uri packageUri = Uri.parse("package:" + tempPkgInfo.packageName);
                    Intent deleteIntent = new Intent();
                    deleteIntent.setAction(Intent.ACTION_DELETE);
                    deleteIntent.setData(packageUri);
                    startActivity(deleteIntent);
                    break;
                }
                
            }

            
        });
        builder.setNegativeButton("取消", null);
        builder.create().show();
        
    }

 passwordDialog = builder.create();此方法返回一个AlertDialog