參考文章：
https://blog.csdn.net/lmj623565791/article/details/72859156#
https://blog.csdn.net/liutaoblog/article/details/52452410
https://blog.csdn.net/q445697127/article/details/40537945
打開相機：
findViewById(R.id.ibCamera).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (ContextCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.CAMERA}, 1000);
} else {
//判斷儲存卡
if(!isExistSDCard()){
return;
}
File fileDir = new File(PathUtils.getRootPath());
if(!fileDir.exists()){
fileDir.mkdir();
}
imgFile = new File(fileDir, System.currentTimeMillis() + ".png");
Uri fileUri = FileProvider7.getUriForFile(MainActivity.this,imgFile);
goPhoneCamera(MainActivity.this, fileUri,2000);
}
}
});
/**
* 判斷手機是否存在SD卡
* @return
*/
public static boolean isExistSDCard() {
if (Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED))
return true;
else
return false;
}
public static void goPhoneCamera(Activity activity, Uri fileUri, int reqCode) {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (intent.resolveActivity(activity.getPackageManager()) != null) {
intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
activity.startActivityForResult(intent, reqCode);
}
}
getRootPath()
//存儲SD卡文件根目錄
public static final String FILE_DIR_ROOT = "photo";
public static String getRootPath() {
return Environment.getExternalStorageDirectory()
+ File.separator + FILE_DIR_ROOT;
}
FileProvider7.java
public final class FileProvider7 {
private FileProvider7() {
}
public static Uri getUriForFile(Context context, File file) {
Uri fileUri = null;
if (Build.VERSION.SDK_INT >= 24) {
fileUri = getUriForFile24(context, file);
} else {
fileUri = Uri.fromFile(file);
}
return fileUri;
}
public static Uri getUriForFile24(Context context, File file) {
Uri fileUri = FileProvider.getUriForFile(context,
context.getPackageName() + ".android7.fileprovider",
file);
return fileUri;
}
public static void setIntentDataAndType(Context context, Intent intent, String type, File file,
boolean writeAble) {
if (Build.VERSION.SDK_INT >= 24) {
intent.setDataAndType(getUriForFile(context, file), type);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
if (writeAble) {
intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
}
} else {
intent.setDataAndType(Uri.fromFile(file), type);
}
}
}
AndroidManifeast.xml
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}.android7.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths" />
</provider>
file_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<resources >
<!--相機圖片保存圖片路徑，屬于APP的存儲空間-->
<paths>
<external-path name="camera_photos" path=""/>
</paths>
</resources>
打開相冊：
findViewById(R.id.ibPhoto).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
goPhotoAlbum(MainActivity.this,2001);
}
});
public static void goPhotoAlbum(Activity activity, int reqCode) {
Intent intent = new Intent();
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
intent.setAction(Intent.ACTION_GET_CONTENT);
intent.setType("image/*");
} else {
intent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");
}
activity.startActivityForResult(intent, reqCode);
}
onActivityResult()監聽
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(resultCode != Activity.RESULT_OK){ return; }
if(requestCode == 2001){
assert data != null;
Uri imgUri = data.getData();
assert imgUri != null;
String pathStr = PathUtils.getImageAbsolutePath(MainActivity.this,imgUri);
img = PathUtils.startUCrop(MainActivity.this,pathStr,2002,1,1);
}else if(requestCode == 2000){
String pathStr = imgFile.getAbsolutePath();
img = PathUtils.startUCrop(MainActivity.this,pathStr,2002,1,1);
// try {
// FileInputStream fis = new FileInputStream(imgFile.getAbsoluteFile());
// Bitmap bitmap = BitmapFactory.decodeStream(fis);
// } catch (FileNotFoundException e) {
// e.printStackTrace();
// }
}else if(requestCode == 2002){
//剪裁完成
}
}
使用UCrop剪裁功能https://github.com/Yalantis/uCrop
/**
* 啟動裁剪
* @param activity 上下文
* @param sourceFilePath 需要裁剪圖片的絕對路徑
* @param requestCode 比如：UCrop.REQUEST_CROP
* @param aspectRatioX 裁剪圖片寬高比
* @param aspectRatioY 裁剪圖片寬高比
* @return
*/
public static String startUCrop(Activity activity, String sourceFilePath,
int requestCode, float aspectRatioX, float aspectRatioY) {
Uri sourceUri = Uri.fromFile(new File(sourceFilePath));
File outDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
if (!outDir.exists()) {
outDir.mkdirs();
}
File outFile = new File(outDir, System.currentTimeMillis() + ".jpg");
//裁剪后圖片的絕對路徑
String cameraScalePath = outFile.getAbsolutePath();
Uri destinationUri = Uri.fromFile(outFile);
//初始化，第一個參數：需要裁剪的圖片；第二個參數：裁剪后圖片
UCrop uCrop = UCrop.of(sourceUri, destinationUri);
//初始化UCrop配置
UCrop.Options options = new UCrop.Options();
//設置裁剪圖片可操作的手勢
options.setAllowedGestures(UCropActivity.SCALE, UCropActivity.ROTATE, UCropActivity.ALL);
//是否隱藏底部容器，默認顯示
options.setHideBottomControls(true);
//設置toolbar顏色
options.setToolbarColor(ActivityCompat.getColor(activity, R.color.colorPrimary));
//設置狀態欄顏色
options.setStatusBarColor(ActivityCompat.getColor(activity, R.color.colorPrimary));
//是否能調整裁剪框
// options.setFreeStyleCropEnabled(true);
//UCrop配置
uCrop.withOptions(options);
//設置裁剪圖片的寬高比，比如16：9
uCrop.withAspectRatio(aspectRatioX, aspectRatioY);
//uCrop.useSourceImageAspectRatio();
//跳轉裁剪頁面
uCrop.start(activity, requestCode);
options.setCropFrameStrokeWidth(1000);
return cameraScalePath;
}
通過Uri獲取圖片絕對路徑
/**
* 根據Uri獲取圖片絕對路徑，解決Android4.4以上版本Uri轉換
* @param imageUri
* @author yaoxing
* @date 2014-10-12
*/
@TargetApi(19)
public static String getImageAbsolutePath(Activity context, Uri imageUri) {
if (context == null || imageUri == null)
return null;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT && DocumentsContract.isDocumentUri(context, imageUri)) {
if (isExternalStorageDocument(imageUri)) {
String docId = DocumentsContract.getDocumentId(imageUri);
String[] split = docId.split(":");
String type = split[0];
if ("primary".equalsIgnoreCase(type)) {
return Environment.getExternalStorageDirectory() + "/" + split[1];
}
} else if (isDownloadsDocument(imageUri)) {
String id = DocumentsContract.getDocumentId(imageUri);
Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
return getDataColumn(context, contentUri, null, null);
} else if (isMediaDocument(imageUri)) {
String docId = DocumentsContract.getDocumentId(imageUri);
String[] split = docId.split(":");
String type = split[0];
Uri contentUri = null;
if ("image".equals(type)) {
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(type)) {
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(type)) {
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}
String selection = MediaStore.Images.Media._ID + "=?";
String[] selectionArgs = new String[] { split[1] };
return getDataColumn(context, contentUri, selection, selectionArgs);
}
} // MediaStore (and general)
else if ("content".equalsIgnoreCase(imageUri.getScheme())) {
// Return the remote address
if (isGooglePhotosUri(imageUri))
return imageUri.getLastPathSegment();
return getDataColumn(context, imageUri, null, null);
}
// File
else if ("file".equalsIgnoreCase(imageUri.getScheme())) {
return imageUri.getPath();
}
return null;
}
public static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {
Cursor cursor = null;
String column = MediaStore.Images.Media.DATA;
String[] projection = { column };
try {
cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);
if (cursor != null && cursor.moveToFirst()) {
int index = cursor.getColumnIndexOrThrow(column);
return cursor.getString(index);
}
} finally {
if (cursor != null)
cursor.close();
}
return null;
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is ExternalStorageProvider.
*/
public static boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is DownloadsProvider.
*/
public static boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is MediaProvider.
*/
public static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is Google Photos.
*/
public static boolean isGooglePhotosUri(Uri uri) {
return "com.google.android.apps.photos.content".equals(uri.getAuthority());
}
完成！
