前言:
在我们的大部分项目当中,几乎都会使用到图片或是视频选择的这么一个功能。
举例:
- 注册时的上传头像。
- 选择背景图片
- 发朋友圈时的照片选择
下面我就来介绍一个方便的开源库
Matisse
的使用(下方使用为个人demo案例)
二话不说
,
先上链接以及效果图
1、. xml
<LinearLayout 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"
android:orientation="vertical"
android:padding="10dp">
<Button
android:id="@+id/button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#4169E1"
android:text="Pick photos"
android:textColor="#ffffff" />
<TextView
android:layout_marginTop="20dp"
android:textSize="13dp"
android:id="@+id/textview"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
2、引入所需要的库
compile 'com.zhihu.android:matisse:0.4.3'
compile 'com.android.support:recyclerview-v7:26.1.0'
compile 'com.github.bumptech.glide:glide:3.7.0'
3、申请权限
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
4、
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.example.jie.photopickerdemo.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths_public">
</meta-data>
</provider>
5、@xml/file_paths_public
<?xml version="1.0" encoding="utf-8"?>
<resources>
<paths>
<external-path
name="my_images"
path="Pictures"/>
</paths>
</resources>
6、. java
package com.example.jie.photopickerdemo;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
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.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private static final int REQUEST_CODE_CHOOSE = 23;
Button button;
TextView textView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = findViewById(R.id.button);
textView = findViewById(R.id.textview);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Matisse.from(MainActivity.this)
.choose(MimeType.allOf())//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.jie.photopickerdemo.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);//
}
});
initPermission();
}
private void initPermission() {
if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
requestPermissions(android.Manifest.permission.WRITE_EXTERNAL_STORAGE,android.Manifest.permission.READ_EXTERNAL_STORAGE);
}
}
@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());
}
}
/**
* Request permission
*
* @param permissions
*/
public void requestPermissions(String... permissions) {
if (Build.VERSION.SDK_INT >= 23) {
List<String> list = new ArrayList<>();
for (int i = 0; i < permissions.length; i++) {
if (ContextCompat.checkSelfPermission(this, permissions[i]) != PackageManager.PERMISSION_GRANTED) {
list.add(permissions[i]);
if (ActivityCompat.shouldShowRequestPermissionRationale(this, permissions[i])) {
Toast.makeText(this, "没有开启权限将会导致部分功能不可使用", Toast.LENGTH_SHORT).show();
}
}
}
ActivityCompat.requestPermissions(this, list.toArray(new String[permissions.length]), 0);
}
}
}
Thanks
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