Android-获取手机上所有图片

核心代码：

Cursor cursor = getContentResolver() .query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, null, null, null, null); while (cursor.moveToNext()) { //获取图片的名称 String name = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DISPLAY_NAME)); //获取图片的生成日期 byte[] data = cursor.getBlob(cursor.getColumnIndex(MediaStore.Images.Media.DATA)); //获取图片的详细信息 String desc = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DESCRIPTION)); names.add(name); descs.add(desc); fileNames.add(new String(data, 0, data.length - 1)); }

demo如下：

1、权限：

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

java类：

package com.example.administrator.downloadimgdemo; import android.app.AlertDialog; import android.database.Cursor; import android.graphics.BitmapFactory; import android.os.Bundle; import android.provider.MediaStore; import android.support.annotation.Nullable; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.AdapterView; import android.widget.Button; import android.widget.ImageView; import android.widget.ListView; import android.widget.SimpleAdapter; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; /** * Created by Administrator on 2017/5/5. */ public class GetAllImg extends AppCompatActivity { //查看图片按钮 private Button look; private Button add; //显示图片名称的list ListView show_list; ArrayList names = null; ArrayList descs = null; ArrayList fileNames = null; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main2); look = (Button) findViewById(R.id.look); add = (Button) findViewById(R.id.add); show_list = (ListView) findViewById(R.id.show_list); names = new ArrayList(); descs = new ArrayList(); fileNames = new ArrayList(); look.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Cursor cursor = getContentResolver().query( MediaStore.Images.Media.EXTERNAL_CONTENT_URI, null, null, null, null); while (cursor.moveToNext()) { //获取图片的名称 String name = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DISPLAY_NAME)); //获取图片的生成日期 byte[] data = cursor.getBlob(cursor.getColumnIndex(MediaStore.Images.Media.DATA)); //获取图片的详细信息 String desc = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DESCRIPTION)); names.add(name); descs.add(desc); fileNames.add(new String(data, 0, data.length - 1)); } List<Map<String, Object>> listItems = new ArrayList<>(); for (int i = 0; i < names.size(); i++) { Map<String, Object> map = new HashMap<>(); map.put("name", names.get(i)); map.put("desc", descs.get(i)); listItems.add(map); } //设置adapter SimpleAdapter adapter = new SimpleAdapter(GetAllImg.this, listItems, R.layout.line, new String[]{"name", "desc"}, new int[]{R.id.name, R.id.desc}); show_list.setAdapter(adapter); } }); ///list的点击事件 show_list.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { View viewDiag = getLayoutInflater().inflate(R.layout.view, null); ImageView image = (ImageView) viewDiag.findViewById(R.id.image); image.setImageBitmap(BitmapFactory.decodeFile((String) fileNames.get(i))); new AlertDialog.Builder(GetAllImg.this).setView(viewDiag) .setPositiveButton("确定", null).show(); } }); } }

布局：

line.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:id="@+id/name" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="name" /> <TextView android:id="@+id/desc" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="desc" /> </LinearLayout>

view.xml

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <ImageView android:id="@+id/image" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/ic_launcher"/> </LinearLayout>

参考：

Android实现获取手机里面的所有图片