AlertDialog.java

Posted 2020-06-23

// 将Activity显示为Dialog的方法:
//     在androidManifest.xml文件中, 设置Activity的属性
//         android:theme="@android:style/Theme.Dialog"

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.DialogInterface.OnMultiChoiceClickListener;
import android.view.LayoutInflater;
import android.view.Menu;
import android.widget.ImageView;
import android.widget.Toast;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle(R.string.app_name);
        builder.setIcon(R.drawable.ic_launcher);
        builder.setMessage("Message");
        
        CharSequence[] items = {"item 0", "item 1", "item 2"};
        boolean[] checkedItems = {true, true, true, true};

        // 选项
        // builder.setItems(items, null);

        // 单选框
        // builder.setSingleChoiceItems(items, 0, new OnClickListener() {
        //     @Override
        //     public void onClick(DialogInterface arg0, int arg1) {
        //         // TODO Auto-generated method stub
        //         Toast.makeText(MainActivity.this, "" +arg1, Toast.LENGTH_SHORT).show();
        //     }
        // });

        
        // 复选框
        // builder.setMultiChoiceItems(items, checkedItems, new OnMultiChoiceClickListener() {
        //     @Override
        //     public void onClick(DialogInterface arg0, int arg1, boolean arg2) {
        //         // TODO Auto-generated method stub
        //         Toast.makeText(MainActivity.this, "" +arg1 + ", " + arg2, Toast.LENGTH_SHORT).show();
        //     }
        // });
        
        builder.setView(getLayoutInflater().inflate(R.layout.activity_main, null));

        // 按钮索引
        //     Positive: -1
        //     Negative: -2
        //     Neutral: -3
        builder.setPositiveButton("确定", null);
        builder.setNegativeButton("取消", null);
        builder.setNeutralButton("中立", null);

        builder.create();
        builder.show();
        
        // Dialog dialog = new Dialog(this);
        // dialog.setContentView(R.layout.activity_main);
        // dialog.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;
    }
}