picture picker（选择多张本地图片，网格布局）

看源代码时，发现一个封装的选择图片方法，觉得特别好用，特地记录一下。 此框架不支持Android7.0！！！

正文

介绍：在界面上点击“添加图片”按钮，进行选择图片（可选择多张，但张数由自己设定了的），然后点击完成，所有选择了的图片按每行三个的方式全部显示在界面上。

1.在app的gradle里的android部分添加

repositories { maven { url "https://jitpack.io" } }

在dependencies里添加

compile 'com.github.valuesfeng:androidpicturepicker:1.0.0' compile 'com.github.bumptech.glide:glide:3.7.0'

androidpicturepicker是重点，另外glide是用于图片缓存显示用的

2.xml布局： 因为是根据选择的图片，自动显示在界面上，所以有代码生成ImageView，使用GridLayout布局，设定列数

<TextView android:id="@+id/tvAddImg" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="15dp" android:textSize="26sp" android:text="添加图片"/> <ScrollView android:layout_width="match_parent" android:layout_height="match_parent"> <GridLayout android:id="@+id/gridLayout" android:useDefaultMargins="true" android:layout_width="match_parent" android:layout_height="wrap_content" android:columnCount="3"> </GridLayout> </ScrollView>

3.activity代码：

public class HomeActivity extends AppCompatActivity { private TextView tvAddImg; private GridLayout gridLayout; private final static int IMG_COUNT = 20; //可以添加的图片总数量 private String[] permissions = {Manifest.permission.READ_EXTERNAL_STORAGE};//存储 private final static int REQUEST_CODE_CHOOSE = 1000; private final static int RESULT_PERMISSION = 1001; private final static int RESULT_SUCCESS = 3; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_home); tvAddImg = (TextView) this.findViewById( R.id.tvAddImg); gridLayout = (GridLayout) this.findViewById( R.id.gridLayout); tvAddImg.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { pickPhoto(); } }); } /** * 选择图片 */ private void pickPhoto() { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { int i = ContextCompat.checkSelfPermission(this, permissions[0]); if (i != PackageManager.PERMISSION_GRANTED) { startRequestPermission(); } else { Picker.from(HomeActivity.this).count(IMG_COUNT).enableCamera(true).setEngine(new GlideEngine()).forResult(REQUEST_CODE_CHOOSE); } } else { Picker.from(HomeActivity.this).count(IMG_COUNT).enableCamera(true).setEngine(new GlideEngine()).forResult(REQUEST_CODE_CHOOSE); } } /** * 接收图片选择结果的回调 * * @param requestCode * @param resultCode * @param intent */ @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP) @Override protected void onActivityResult(int requestCode, int resultCode, Intent intent) { super.onActivityResult(requestCode, resultCode, intent); if (resultCode == RESULT_OK) { WindowManager wm = (WindowManager) getApplicationContext().getSystemService(Context.WINDOW_SERVICE); int width = wm.getDefaultDisplay().getWidth(); int height = wm.getDefaultDisplay().getHeight(); List<Uri> uris = PicturePickerUtils.obtainResult(intent); if (uris != null && uris.size() != 0) { for( int i = 0; i < uris.size(); i++){ LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams( (width-60)/3, height/3 ); ImageView imageView = new ImageView( HomeActivity.this); imageView.setLayoutParams(layoutParams); gridLayout.addView( imageView); Glide.with( HomeActivity.this).load( uris.get( i) ).into( imageView); } } } } // 开始提交请求权限 private void startRequestPermission() { ActivityCompat.requestPermissions(HomeActivity.this, permissions, RESULT_SUCCESS); } // 用户权限 申请 的回调方法 @Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { super.onRequestPermissionsResult(requestCode, permissions, grantResults); if (requestCode == RESULT_SUCCESS) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { if (grantResults[0] != PackageManager.PERMISSION_GRANTED) { // 判断用户是否 点击了不再提醒。(检测该权限是否还可以申请) boolean b = shouldShowRequestPermissionRationale(permissions[0]); if (!b) { // 用户还是想用我的 APP 的 // 提示用户去应用设置界面手动开启权限 showDialogTipUserGoToAppSettting(); } } } } } /** * 提示用户去应用设置界面手动开启权限 */ private void showDialogTipUserGoToAppSettting() { AlertDialog dialog = new AlertDialog.Builder(HomeActivity.this) .setTitle("权限不可用") .setMessage("请在-设置-应用管理中，允许使用存储权限") .setPositiveButton("立即开启", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // 跳转到应用设置界面 goToAppSetting(); } }) .setNegativeButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }).setCancelable(false).show(); } /** * 跳转到当前应用的设置界面 */ private void goToAppSetting() { Intent intent = new Intent(); intent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS); Uri uri = Uri.fromParts("package", getPackageName(), null); intent.setData(uri); startActivityForResult(intent, RESULT_PERMISSION); } }

更新一下：

更新核心：使用GridView来布局。 1.xml布局：

<GridView android:id="@+id/gridView" android:layout_margin="10dp" android:layout_width="match_parent" android:layout_height="match_parent" android:numColumns="3" android:verticalSpacing="10dp" android:horizontalSpacing="10dp" android:gravity="center" />

2.activity代码：

public class HomeActivity extends AppCompatActivity { private TextView tvAddImg; private GridView gridView; private GridAdapter gridAdapter; private List<Uri> allUriList = new ArrayList<>(); private static int WINDOW_WIDTH; private static int WINDOW_HEIGHT; private final static int IMG_COUNT = 20; //一次性可以添加的图片总数量 private String[] permissions = {Manifest.permission.READ_EXTERNAL_STORAGE};//存储 private final static int REQUEST_CODE_CHOOSE = 1000; private final static int RESULT_PERMISSION = 1001; private final static int RESULT_SUCCESS = 3; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_home); WindowManager wm = (WindowManager) getApplicationContext().getSystemService(Context.WINDOW_SERVICE); WINDOW_WIDTH = wm.getDefaultDisplay().getWidth(); WINDOW_HEIGHT = wm.getDefaultDisplay().getHeight(); tvAddImg = (TextView) this.findViewById( R.id.tvAddImg); gridView = (GridView) this.findViewById( R.id.gridView); //为GridView设置适配器 gridAdapter = new GridAdapter(); gridView.setAdapter(gridAdapter); tvAddImg.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { pickPhoto(); } }); } /** * 选择图片 */ private void pickPhoto() { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { int i = ContextCompat.checkSelfPermission(this, permissions[0]); if (i != PackageManager.PERMISSION_GRANTED) { startRequestPermission(); } else { Picker.from(HomeActivity.this).count(IMG_COUNT).enableCamera(true).setEngine(new GlideEngine()).forResult(REQUEST_CODE_CHOOSE); } } else { Picker.from(HomeActivity.this).count(IMG_COUNT).enableCamera(true).setEngine(new GlideEngine()).forResult(REQUEST_CODE_CHOOSE); } } /** * 接收图片选择结果的回调 * * @param requestCode * @param resultCode * @param intent */ @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP) @Override protected void onActivityResult(int requestCode, int resultCode, Intent intent) { super.onActivityResult(requestCode, resultCode, intent); if (resultCode == RESULT_OK) { List<Uri> uriList = PicturePickerUtils.obtainResult(intent); allUriList.addAll( uriList); //更新数据 gridAdapter.notifyDataSetChanged(); tvAddImg.setText("添加图片(" + allUriList.size() +"张)"); } } /** * 开始提交请求权限 */ private void startRequestPermission() { ActivityCompat.requestPermissions(HomeActivity.this, permissions, RESULT_SUCCESS); } /** * 用户权限 申请 的回调方法 * @param requestCode * @param permissions * @param grantResults */ @Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { super.onRequestPermissionsResult(requestCode, permissions, grantResults); if (requestCode == RESULT_SUCCESS) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { if (grantResults[0] != PackageManager.PERMISSION_GRANTED) { // 判断用户是否 点击了不再提醒。(检测该权限是否还可以申请) boolean b = shouldShowRequestPermissionRationale(permissions[0]); if (!b) { // 用户还是想用我的 APP 的 // 提示用户去应用设置界面手动开启权限 showDialogTipUserGoToAppSettting(); } } } } } /** * 提示用户去应用设置界面手动开启权限 */ private void showDialogTipUserGoToAppSettting() { AlertDialog dialog = new AlertDialog.Builder(HomeActivity.this) .setTitle("权限不可用") .setMessage("请在-设置-应用管理中，允许使用存储权限") .setPositiveButton("立即开启", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // 跳转到应用设置界面 goToAppSetting(); } }) .setNegativeButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }).setCancelable(false).show(); } /** * 跳转到当前应用的设置界面 */ private void goToAppSetting() { Intent intent = new Intent(); intent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS); Uri uri = Uri.fromParts("package", getPackageName(), null); intent.setData(uri); startActivityForResult(intent, RESULT_PERMISSION); } class GridAdapter extends BaseAdapter{ @Override public int getCount() { return allUriList.size(); } @Override public Object getItem(int i) { return allUriList.get(i); } @Override public long getItemId(int i) { return i; } @Override public View getView(int position, View convertView, ViewGroup viewGroup) { ImageView imageView; if (convertView == null) { imageView = new ImageView( getApplicationContext()); imageView.setLayoutParams(new GridView.LayoutParams((WINDOW_WIDTH-120)/3, (WINDOW_HEIGHT-120)/4));//设置ImageView对象布局 imageView.setAdjustViewBounds(false);//设置边界对齐 imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE);//设置刻度的类型 } else { imageView = (ImageView) convertView; } if( allUriList != null && allUriList.size() > 0 ){ Glide.with( HomeActivity.this).load( allUriList.get( position) ).into( imageView);//为ImageView设置图片资源 } return imageView; } } }

区别每次选择照片的请求

pickPhoto函数可以根据自己是否需要传入（int型 code）请求码， Picker.from(ActEditAgencyInfo.this).count(1).enableCamera(true).setEngine(new GlideEngine()).forResult(code); 1为指定的可以选择的图片最大张数 code必须对应起来，这样才能知道是哪个请求码对应哪次选择的图片

2.在onActivityResult(int requestCode, int resultCode, Intent intent)函数里resultCode是对应请求是否成功啥的，根据需要自行进行区别值即对应的操作；requestCode则对应步骤1中的code，根据区分它的值，来获取自己此次选择的照片。

在上面的例子中进行修改，如下：

定义此次选择图片对应的请求码：

private final static int RESULT_IMAGE = 11;

调用函数，传入请求码：

pickPhoto(RESULT_IMAGE);

函数里使用此请求码：

private void pickPhoto(int code) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { int i = ContextCompat.checkSelfPermission(this, permissions[0]); if (i != PackageManager.PERMISSION_GRANTED) { startRequestPermission(); } else { Picker.from(ActEditAgencyInfo.this).count(1).enableCamera(true).setEngine(new GlideEngine()).forResult(code); } } else { Picker.from(ActEditAgencyInfo.this).count(1).enableCamera(true).setEngine(new GlideEngine()).forResult(code); } }

在结果回调中，区分请求码：

@Override protected void onActivityResult(int requestCode, int resultCode, Intent intent) { super.onActivityResult(requestCode, resultCode, intent); if (resultCode == RESULT_OK) { List<Uri> uris = PicturePickerUtils.obtainResult(intent); if (uris != null && uris.size() != 0) { switch (requestCode) { case RESULT_IMAGE: Glide.with(ActEditAgencyInfo.this).load(uris.get(0)).into(ivLicense); break; } } } }

Demo下载：[免费]选择多张本地图片网格布局-下载 http://download.csdn.net/download/an_nal/9965347