android:图片：用matisse作为图片选择器

一，安装第三方库

库地址:

https://mvnrepository.com/artifact/com.zhihu.android/matisse

编辑 build.gradle,添加：

// https://mvnrepository.com/artifact/com.zhihu.android/matisse
implementation 'com.zhihu.android:matisse:0.5.3-beta3'

然后点击 Sync Now 链接

二，代码

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:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".activity.ImagePickActivity">


    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="162dp"
        android:layout_marginTop="96dp"
        android:layout_marginEnd="161dp"
        android:layout_marginBottom="587dp"
        android:text="打开图片选择对话框"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/resultText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginStart="0dp"
        android:layout_marginTop="68dp"
        android:layout_marginEnd="0dp"
        android:layout_marginBottom="470dp"
        android:text="图片选择结果"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/button2" />

</androidx.constraintlayout.widget.ConstraintLayout>

java

package com.example.okdemo1.activity;

import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import androidx.activity.EdgeToEdge;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;

import com.example.okdemo1.MainActivity;
import com.example.okdemo1.R;
import com.zhihu.matisse.Matisse;
import com.zhihu.matisse.MimeType;
import com.zhihu.matisse.engine.impl.GlideEngine;
import com.zhihu.matisse.internal.entity.CaptureStrategy;

import java.io.File;
import java.util.List;

public class ImagePickActivity extends AppCompatActivity {
    private static final int REQUEST_CODE_CHOOSE = 23;
    private TextView textView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        EdgeToEdge.enable(this);
        setContentView(R.layout.activity_image_pick);

        //返回结果的view
        textView = findViewById(R.id.resultText);

        //给按钮增加点击事件
        Button button2 = findViewById(R.id.button2);
        button2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Matisse.from(ImagePickActivity.this)
                        .choose(MimeType.of(MimeType.JPEG, MimeType.WEBP, MimeType.PNG, MimeType.GIF))//图片类型
                        .countable(true)//true:选中后显示数字;false:选中后显示对号
                        .maxSelectable(5)//可选的最大数
                        .capture(true)//选择照片时，是否显示拍照
                        .captureStrategy(new CaptureStrategy(true, "com.example.xx.fileprovider"))//参数1 true表示拍照存储在共有目录，false表示存储在私有目录；参数2与 AndroidManifest中authorities值相同，用于适配7.0系统 必须设置
                        .imageEngine(new GlideEngine())//图片加载引擎
                        .forResult(REQUEST_CODE_CHOOSE);//
            }
        });
    }

    //得到选择图片的结果
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == REQUEST_CODE_CHOOSE && resultCode == RESULT_OK) {
            List<Uri> result = Matisse.obtainResult(data);
            //textView.setText(result.toString());
            //遍历列表
            for (int i = 0; i < result.size(); i++) {
                Uri oneUri = result.get(i);
                // 对元素进行操作
                File one = getFileByUri(oneUri, this);
                System.out.println("path = " + one.getPath());
            }
        }
    }

    //uri转文件
    public static File getFileByUri(Uri uri, Context context) {
        String path = null;
        if ("file".equals(uri.getScheme())) {
            path = uri.getEncodedPath();
            if (path != null) {
                path = Uri.decode(path);
                ContentResolver cr = context.getContentResolver();
                StringBuffer buff = new StringBuffer();
                buff.append("(").append(MediaStore.Images.ImageColumns.DATA).append("=").append("'" + path + "'").append(")");
                Cursor cur = cr.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, new String[] { MediaStore.Images.ImageColumns._ID, MediaStore.Images.ImageColumns.DATA }, buff.toString(), null, null);
                int index = 0;
                int dataIdx = 0;
                for (cur.moveToFirst(); !cur.isAfterLast(); cur.moveToNext()) {
                    index = cur.getColumnIndex(MediaStore.Images.ImageColumns._ID);
                    index = cur.getInt(index);
                    dataIdx = cur.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
                    path = cur.getString(dataIdx);
                }
                cur.close();
                if (index == 0) {
                } else {
                    Uri u = Uri.parse("content://media/external/images/media/" + index);
                    System.out.println("temp uri is :" + u);
                }
            }
            if (path != null) {
                return new File(path);
            }
        } else if ("content".equals(uri.getScheme())) {
            // 4.2.2以后
            String[] proj = { MediaStore.Images.Media.DATA };
            Cursor cursor = context.getContentResolver().query(uri, proj, null, null, null);
            if (cursor.moveToFirst()) {
                int columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
                path = cursor.getString(columnIndex);
            }
            cursor.close();

            return new File(path);
        } else {
            //Log.i(TAG, "Uri Scheme:" + uri.getScheme());
        }
        return null;
    }
}

三，测试效果