本文实例为大家分享了 Android微信选择图片的具体代码，和微信拍照功能，供大家参考，具体内容如下
1.Android6.0系统，对于权限的使用都是需要申请，选择图片和拍照需要申请Manifest.permission.CAMERA, Manifest.permission.READ_EXTERNAL_STORAGE这两个权限。
if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions((Activity) this,
new String[] { Manifest.permission.CAMERA, Manifest.permission.READ_EXTERNAL_STORAGE},
REQUEST_STORAGE_READ_ACCESS_PERMISSION);
}
2.通过图片选择器MultiImageSelector来管理: 选择模式、最大选择数量、是否启动相机等功能。
3.点击图片选择按钮跳转到MultiImageSelectorActivity类，其布局如下：（一个Toobar + 一个FrameLayout）
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:orientation="vertical" android:background="#181819" android:layout_width="match_parent" android:layout_height="match_parent"> <android.support.v7.widget.Toolbar android:id="@+id/toolbar" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@color/mis_actionbar_color" app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" android:minHeight="?android:attr/actionBarSize"> <Button android:id="@+id/commit" android:background="@drawable/mis_action_btn" android:minHeight="1dp" android:minWidth="1dp" android:layout_marginRight="16dp" android:paddingLeft="10dp" android:paddingRight="10dp" android:paddingTop="5dp" android:paddingBottom="5dp" android:textColor="@color/mis_default_text_color" android:textSize="14sp" android:layout_gravity="right" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </android.support.v7.widget.Toolbar> <FrameLayout android:id="@+id/image_grid" android:layout_width="match_parent" android:layout_height="match_parent" /> </LinearLayout>
4.调用如下方法填充展示图片的fragment（MultiImageSelectorFragment）。
getSupportFragmentManager().beginTransaction()
.add(R.id.image_grid, Fragment.instantiate(this, MultiImageSelectorFragment.class.getName(), bundle))
.commit();
5.MultiImageSelectorFragment布局用gridview显示从相册获取的图片
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:background="@android:color/black" android:layout_width="match_parent" android:layout_height="match_parent"> <GridView android:id="@+id/grid" android:layout_width="match_parent" android:layout_height="match_parent" android:horizontalSpacing="@dimen/mis_space_size" android:verticalSpacing="@dimen/mis_space_size" android:paddingBottom="?android:attr/actionBarSize" android:clipToPadding="false" android:numColumns="3"/> <RelativeLayout android:clickable="true" android:id="@+id/footer" android:background="#cc000000" android:layout_alignParentBottom="true" android:layout_width="match_parent" android:layout_height="?android:attr/actionBarSize"> <Button android:id="@+id/category_btn" android:paddingLeft="16dp" android:paddingRight="16dp" android:layout_centerVertical="true" android:textColor="@color/mis_folder_text_color" tools:text="所有图片" android:textSize="16sp" android:gravity="center_vertical" android:drawableRight="@drawable/mis_text_indicator" android:drawablePadding="5dp" android:background="@null" android:singleLine="true" android:ellipsize="end" android:layout_width="wrap_content" android:layout_height="match_parent" /> </RelativeLayout> </RelativeLayout>
6调用android.support.v4.app.LoaderManager.class类里面的LoaderCallbacks方法，等加载完成后给mImageAdapter设置数据。
mImageAdapter.setData(images);
7.当允许拍照的时候，显示拍照按钮，调用系统相机功能。
mGridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
if (mImageAdapter.isShowCamera()) {
if (i == 0) {
showCameraAction();
} else {
Image image = (Image) adapterView.getAdapter().getItem(i);
selectImageFromGrid(image, mode);
}
} else {
Image image = (Image) adapterView.getAdapter().getItem(i);
selectImageFromGrid(image, mode);
}
}
});
调用相机功能
/**
* Open camera
*/
private void showCameraAction() {
if(ContextCompat.checkSelfPermission(getContext(), Manifest.permission.WRITE_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED){
requestPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE,
getString(R.string.mis_permission_rationale_write_storage),
REQUEST_STORAGE_WRITE_ACCESS_PERMISSION);
}else {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (intent.resolveActivity(getActivity().getPackageManager()) != null) {
try {
mTmpFile = FileUtils.createTmpFile(getActivity());
} catch (IOException e) {
e.printStackTrace();
}
if (mTmpFile != null && mTmpFile.exists()) {
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(mTmpFile));
startActivityForResult(intent, REQUEST_CAMERA);
} else {
Toast.makeText(getActivity(), R.string.mis_error_image_not_exist, Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(getActivity(), R.string.mis_msg_no_camera, Toast.LENGTH_SHORT).show();
}
}
}
选择图片
/**
* notify callback
* @param image image data
*/
private void selectImageFromGrid(Image image, int mode) {
if(image != null) {
if(mode == MODE_MULTI) {
if (resultList.contains(image.path)) {
resultList.remove(image.path);
if (mCallback != null) {
mCallback.onImageUnselected(image.path);
}
} else {
if(selectImageCount() == resultList.size()){
Toast.makeText(getActivity(), R.string.mis_msg_amount_limit, Toast.LENGTH_SHORT).show();
return;
}
resultList.add(image.path);
if (mCallback != null) {
mCallback.onImageSelected(image.path);
}
}
mImageAdapter.select(image);
}else if(mode == MODE_SINGLE){
if(mCallback != null){
mCallback.onSingleImageSelected(image.path);
}
}
}
}
本文已被整理到了《Android微信开发教程汇总》，欢迎大家学习阅读。
源码下载：http://xiazai.zyiz.net/201611/yuanma/AndroidselectPicture(zyiz.net).rar
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持找一找教程网。
