Android 实现获取手机里面的所有图片详解及实例

实现代码：

public class MainActivity extends Activity { //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(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); look = (Button) findViewById(R.id.look); add = (Button) findViewById(R.id.add); show_list = (ListView) findViewById(R.id.show_list); look.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { names = new ArrayList(); descs = new ArrayList(); fileNames = new ArrayList(); 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(MainActivity.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(MainActivity.this).setView(viewDiag) .setPositiveButton("确定",null).show(); } }); } }

XML：

<!--获取手机存储卡权限--><uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

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