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：
publicclassMainActivityextendsActivity{
//查看图片按钮
privateButtonlook;
privateButtonadd;
//显示图片名称的list
ListViewshow_list;
ArrayListnames=null;
ArrayListdescs=null;
ArrayListfileNames=null;
@Override
protectedvoidonCreate(BundlesavedInstanceState){
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(newView.OnClickListener(){
@Override
publicvoidonClick(Viewview){
names=newArrayList();
descs=newArrayList();
fileNames=newArrayList();
Cursorcursor=getContentResolver().query(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,null,null,null,null);
while(cursor.moveToNext()){
//获取图片的名称
Stringname=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
Stringdesc=cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DESCRIPTION));
names.add(name);
descs.add(desc);
fileNames.add(newString(data,0,data.length-1));
}
List>listItems=newArrayList<>();
for(inti=0;imap=newHashMap<>();
map.put("name",names.get(i));
map.put("desc",descs.get(i));
listItems.add(map);
}
//设置adapter
SimpleAdapteradapter=newSimpleAdapter(MainActivity.this,listItems,
R.layout.line,newString[]{"name","desc"},newint[]{R.id.name,R.id.desc});
show_list.setAdapter(adapter);
}
});
///list的点击事件
show_list.setOnItemClickListener(newAdapterView.OnItemClickListener(){
@Override
publicvoidonItemClick(AdapterViewadapterView,Viewview,inti,longl){
ViewviewDiag=getLayoutInflater().inflate(R.layout.view,null);
ImageViewimage=(ImageView)viewDiag.findViewById(R.id.image);
image.setImageBitmap(BitmapFactory.decodeFile((String)fileNames.get(i)));
newAlertDialog.Builder(MainActivity.this).setView(viewDiag)
.setPositiveButton("确定",null).show();
}
});
}
}
XML：
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