不需要第三方SDK就能实现Android图片的分享

Posted 2021-12-14 我想月薪过万

效果展示

原理分析

        隐示意图

代码展示

MainActivity.java

package com.wust.shareappdemo;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity 

    private Button btn_share;

    @Override
    protected void onCreate(Bundle savedInstanceState) 
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn_share = findViewById(R.id.btn_share);
        btn_share.setOnClickListener(new View.OnClickListener() 
            @Override
            public void onClick(View view) 
                // 创建图片
                Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.img);
                // 根据图片生成 uri
                Uri uri = Uri.parse(MediaStore.Images.Media.insertImage(getContentResolver(), bitmap, "分享图片", null));
                // 分享的关键代码 采用隐示意图分享图片
                Intent intent = new Intent();
                intent.setAction(Intent.ACTION_SEND);
                intent.setType("image/png");
                intent.putExtra(Intent.EXTRA_STREAM, uri);
                startActivity(intent);
            
        );
    

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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=".MainActivity">

    <Button
        android:id="@+id/btn_share"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="分享"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>