android获取手机所有图片大小,Android 实现获取手机里面的所有图片详解及实例

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> listItems = new ArrayList<>();

for (int i = 0; i < names.size(); i++) {

Map 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：

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