安卓——Toast动态显示信息

Bertha 。 2022-05-29 06:28 257阅读 0赞

![Image 1][]

activity\_main.xml

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context="com.example.lenovo.toast.MainActivity">
    
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            android:gravity="center"
            >
    
    
            <Button
                android:id="@+id/toast_btn"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="显示默认Toast" />
    
            <Button
                android:id="@+id/toast_btn2"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="显示改变位置的Toast" />
    
            <Button
                android:id="@+id/toast_btn3"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="显示带图片的Toast" />
    
            <Button
                android:id="@+id/toast_btn4"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="显示完全自定的Toast" />
    
        </LinearLayout>
    
    </RelativeLayout>

toast\_layout.xml

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
    
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="这是自定义的Toast"
            android:layout_gravity="center"
            android:textSize="14dip"
    
            />
        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/topimg"
            />
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="这是自定义的Toast"
            android:layout_gravity="center"
            android:textSize="14dip"
    
            />
    
    
    </LinearLayout>

MainActivity.java

package com.example.lenovo.toast;
    
    import android.app.Activity;
    import android.os.Bundle;
    import android.view.Gravity;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.widget.Button;
    import android.widget.ImageView;
    import android.widget.LinearLayout;
    import android.widget.Toast;
    
    public class MainActivity extends Activity {
    
        private Button button;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
    
            button=(Button)findViewById(R.id.toast_btn);
    
            button.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    showToast();
                }
            });
    
            findViewById(R.id.toast_btn2).setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    showToast2();
                }
            });
    
            findViewById(R.id.toast_btn3).setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
    
                    showToast3();
                }
            });
    
            findViewById(R.id.toast_btn4).setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
    
                    showToast4();
                }
            });
        }
    
        void showToast(){
    
            Toast.makeText(MainActivity.this, "这是默认的Toast", Toast.LENGTH_SHORT).show();
        }
    
        void showToast2(){
    
            Toast toast;
            toast=Toast.makeText(MainActivity.this, "这是改变的Toast", Toast.LENGTH_SHORT);
            toast.setGravity(Gravity.CENTER,0,0);
            toast.show();
        }
    
    
        void showToast3(){
    
            Toast toast;
            toast=Toast.makeText(MainActivity.this, "这是带图片的的Toast", Toast.LENGTH_SHORT);
            //获取一下toast的布局
            LinearLayout toast_layouy=(LinearLayout) toast.getView();
            ImageView imageView=new ImageView(this);
            imageView.setImageResource(R.drawable.topimg);
            //把ImageView添加到布局中
            toast_layouy.addView(imageView,0);
    
            toast.show();
        }
    
        void  showToast4(){
    
            LayoutInflater inflater=LayoutInflater.from(this);
            View toast_view=inflater.inflate(R.layout.toast_layout,null);
            Toast toast=new Toast(this);
            toast.setView(toast_view);
            toast.show();
        }
    }

[Image 1]: