android studio 弹出框设置

最新推荐文章于 2024-06-28 02:04:24 发布

原创最新推荐文章于 2024-06-28 02:04:24 发布 · 7.2k 阅读

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文章标签：

#android #android studio #xml

本文介绍了在Android Studio中如何解决dialog实现时遇到的问题，包括修复V7包的错误，将`AppcompatActivity`替换为`AppCompatActivity`，修改`AlertDialog`的导入，以及创建和显示提示框的方法。

android studio dialog实现

dialog实现

在activity.main中编辑

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btn2"
        android:text="多选框"
        android:onClick="onclick"/>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btn3"
        android:text="单选框"
        android:layout_below="@id/btn2"
        android:onClick="onclick"/>
    　
</RelativeLayout>

MainActivity

导入包时存在错误
一、V7存在问题
import android.support.v7.app.AppcompatActivity报错时，
将其改成
import androidx.appcompat.app.AppCompatActivity;

二、alertdiag存在问题
import android.app.v7.AlertDialog;
将其改成
import android.app.AlertDialog;

三、Toast存在问题
新建toast java文件

package com.example.dialog;
import android.content.Context;
import android.widget.Toast;


public class ToastUtil {
    private Toast mToast;
    private Context context;

    public ToastUtil(Context context) {
        this.context = context;
    }

    public static void showMsg(MainActivity mainActivity, String s) {
    }


    public Toast getSingletonToast(int resId) {
        if (mToast == null) {
            mToast = Toast.makeText(context, resId, Toast.LENGTH_SHORT);
        }else{
            mToast.setText(resId);
        }
        return mToast;
    }

    public Toast getSingletonToast(String text) {
        if (mToast == null) {
            mToast = Toast.makeText(context, text, Toast.LENGTH_SHORT);
        }else{
            mToast.setText(text);
        }
        return mToast;
    }

    public Toast getSingleLongToast(int resId) {
        if (mToast == null) {
            mToast = Toast.makeText(context, resId, Toast.LENGTH_LONG);
        }else{
            mToast.setText(resId);
        }
        return mToast;
    }

    public Toast getSingleLongToast(String text) {
        if (mToast == null) {
            mToast = Toast.makeText(context, text, Toast.LENGTH_LONG);
        }else{
            mToast.setText(text);
        }
        return mToast;
    }

    public Toast getToast(int resId) {
        return Toast.makeText(context, resId, Toast.LENGTH_SHORT);
    }

    public Toast getToast(String text) {
        return Toast.makeText(context, text, Toast.LENGTH_SHORT);
    }

    public Toast getLongToast(int resId) {
        return Toast.makeText(context, resId, Toast.LENGTH_LONG);
    }

    public Toast getLongToast(String text) {
        return Toast.makeText(context, text, Toast.LENGTH_LONG);
    }

    public void showSingletonToast(int resId) {
        getSingletonToast(resId).show();
    }


    public void showSingletonToast(String text) {
        getSingletonToast(text).show();
    }

    public void showSingleLongToast(int resId) {
        getSingleLongToast(resId).show();
    }


    public void showSingleLongToast(String text) {
        getSingleLongToast(text).show();
    }

    public void showToast(int resId) {
        getToast(resId).show();
    }

    public void showToast(String text) {
        getToast(text).show();
    }

    public void showLongToast(int resId) {
        getLongToast(resId).show();
    }

    public void showLongToast(String text) {
        getLongToast(text).show();
    }
}

MainActivity代码

package com.example.dialog;



import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.content.DialogInterface;
import android.app.AlertDialog;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import com.example.dialog.ToastUtil;

public class MainActivity extends AppCompatActivity {

    private Button mBtnDialog1,mBtnDialog2,mBtnDialog3;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mBtnDialog1 = findViewById(R.id.btn1);
        mBtnDialog2 = findViewById(R.id.btn2);
        mBtnDialog3 = findViewById(R.id.btn3);
        OnClick onClick = new OnClick();
       mBtnDialog2.setOnClickListener(onClick);
       mBtnDialog3.setOnClickListener(onClick);
    }
    class OnClick implements View.OnClickListener{
        @Override
        public void onClick(View v){
            switch (v.getId()){
                case R.id.btn2://多选样式
                    final String[] array4 = new String[]{"历史因素","人文因素","环境因素"};
                    boolean[] isSelected = new boolean[]{false,false,false};
                    AlertDialog.Builder builder4 = new AlertDialog.Builder(MainActivity.this);
                    builder4.setTitle("导致俄乌局势因素").setMultiChoiceItems(array4, isSelected, new DialogInterface.OnMultiChoiceClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which, boolean isChecked) {
                            ToastUtil.showMsg(MainActivity.this,array4[which]+":"+isChecked);
                        }
                    }).setPositiveButton("确定", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            //
                        }
                    }).setNegativeButton("取消", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            //
                        }
                    }).setCancelable(false).show();
                    break;
                case R.id.btn3:  //单选样式
                    final String [] array3 = new String[]{"是","否"};
                    AlertDialog.Builder builder3 = new AlertDialog.Builder(MainActivity.this);
                    //setSingleChoiceItems(数组，默认选中的数组索引，监听)
                    builder3.setTitle("我们是同志吗").setSingleChoiceItems(array3, 0, new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            ToastUtil.showMsg(MainActivity.this,array3[which]);

                        }
                    }).setPositiveButton("确定", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            //
                        }
                    }).setNegativeButton("取消", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            //
                        }
                    }).setCancelable(false).show();
                    break;
            }
        }
    }
}

提示框展示

在这里插入图片描述