配置文件：AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest
package="com.xba.uploadphoto"
xmlns:android="http://schemas.android.com/apk/res/android">
<uses-feature android:name="android.hardware.camera"/>
<uses-feature android:name="android.hardware.camera.autofocus"/>
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>
</manifest>
布局：activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity1" >
<LinearLayout
android:id="@+id/btn_layout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<Button
android:id="@+id/btn"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Choose picture" />
<Button
android:id="@+id/btn2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Crop picture" />
</LinearLayout>
<ImageView
android:id="@+id/img"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/btn_layout" />
</RelativeLayout>
主类：MainActivity
package com.xba.uploadphoto;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.ContentResolver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
public class MainActivity extends Activity {
private static final int TAKE_PICTURE = 0;
private static final int CHOOSE_PICTURE = 1;
private static final int CROP = 2;
private static final int CROP_PICTURE = 3;
private static final int SCALE = 5;//照片缩小比例
private ImageView iv_image = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setTitle("Demo作者：@唐韧_Ryan");
iv_image = (ImageView) this.findViewById(R.id.img);
this.findViewById(R.id.btn).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
//即拍即显示
showPicturePicker(MainActivity.this,false);
}
});
this.findViewById(R.id.btn2).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
//截图后显示
showPicturePicker(MainActivity.this,true);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
switch (requestCode) {
case TAKE_PICTURE:
//将保存在本地的图片取出并缩小后显示在界面上
Bitmap bitmap = BitmapFactory.decodeFile(Environment.getExternalStorageDirectory()+"/image.jpg");
Bitmap newBitmap = ImageTools.zoomBitmap(bitmap, bitmap.getWidth() / SCALE, bitmap.getHeight() / SCALE);
//由于Bitmap内存占用较大，这里需要回收内存，否则会报out of memory异常
bitmap.recycle();
//将处理过的图片显示在界面上，并保存到本地
iv_image.setImageBitmap(newBitmap);
ImageTools.savePhotoToSDCard(newBitmap, Environment.getExternalStorageDirectory().getAbsolutePath(), String.valueOf(System.currentTimeMillis()));
break;
case CHOOSE_PICTURE:
ContentResolver resolver = getContentResolver();
//照片的原始资源地址
Uri originalUri = data.getData();
try {
//使用ContentProvider通过URI获取原始图片
Bitmap photo = MediaStore.Images.Media.getBitmap(resolver, originalUri);
if (photo != null) {
//为防止原始图片过大导致内存溢出，这里先缩小原图显示，然后释放原始Bitmap占用的内存
Bitmap smallBitmap = ImageTools.zoomBitmap(photo, photo.getWidth() / SCALE, photo.getHeight() / SCALE);
//释放原始图片占用的内存，防止out of memory异常发生
photo.recycle();
iv_image.setImageBitmap(smallBitmap);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
break;
case CROP:
Uri uri = null;
if (data != null) {
uri = data.getData();
System.out.println("Data");
}else {
System.out.println("File");
String fileName = getSharedPreferences("temp",Context.MODE_WORLD_WRITEABLE).getString("tempName", "");
uri = Uri.fromFile(new File(Environment.getExternalStorageDirectory(),fileName));
}
cropImage(uri, 500, 500, CROP_PICTURE);
break;
case CROP_PICTURE:
Bitmap photo = null;
Uri photoUri = data.getData();
if (photoUri != null) {
photo = BitmapFactory.decodeFile(photoUri.getPath());
}
if (photo == null) {
Bundle extra = data.getExtras();
if (extra != null) {
photo = (Bitmap)extra.get("data");
ByteArrayOutputStream stream = new ByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.JPEG, 100, stream);
}
}
iv_image.setImageBitmap(photo);
break;
default:
break;
}
}
}
public void showPicturePicker(Context context,boolean isCrop){
final boolean crop = isCrop;
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle("图片来源");
builder.setNegativeButton("取消", null);
builder.setItems(new String[]{"拍照","相册"}, new DialogInterface.OnClickListener() {
//类型码
int REQUEST_CODE;
@Override
public void onClick(DialogInterface dialog, int which) {
switch (which) {
case TAKE_PICTURE:
Uri imageUri = null;
String fileName = null;
Intent openCameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (crop) {
REQUEST_CODE = CROP;
//删除上一次截图的临时文件
SharedPreferences sharedPreferences = getSharedPreferences("temp",Context.MODE_WORLD_WRITEABLE);
ImageTools.deletePhotoAtPathAndName(Environment.getExternalStorageDirectory().getAbsolutePath(), sharedPreferences.getString("tempName", ""));
//保存本次截图临时文件名字
fileName = String.valueOf(System.currentTimeMillis()) + ".jpg";
Editor editor = sharedPreferences.edit();
editor.putString("tempName", fileName);
editor.commit();
}else {
REQUEST_CODE = TAKE_PICTURE;
fileName = "image.jpg";
}
imageUri = Uri.fromFile(new File(Environment.getExternalStorageDirectory(),fileName));
//指定照片保存路径（SD卡），image.jpg为一个临时文件，每次拍照后这个图片都会被替换
openCameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
startActivityForResult(openCameraIntent, REQUEST_CODE);
break;
case CHOOSE_PICTURE:
Intent openAlbumIntent = new Intent(Intent.ACTION_GET_CONTENT);
if (crop) {
REQUEST_CODE = CROP;
}else {
REQUEST_CODE = CHOOSE_PICTURE;
}
openAlbumIntent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");
startActivityForResult(openAlbumIntent, REQUEST_CODE);
break;
default:
break;
}
}
});
builder.create().show();
}
//截取图片
public void cropImage(Uri uri, int outputX, int outputY, int requestCode){
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setDataAndType(uri, "image/*");
intent.putExtra("crop", "true");
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
intent.putExtra("outputX", outputX);
intent.putExtra("outputY", outputY);
intent.putExtra("outputFormat", "JPEG");
intent.putExtra("noFaceDetection", true);
intent.putExtra("return-data", true);
startActivityForResult(intent, requestCode);
}
}
工具类：ImageTools
package com.xba.uploadphoto;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Shader.TileMode;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
/**
* Tools for handler picture
*
* @author Ryan.Tang
*
*/
public final class ImageTools {
/**
* Transfer drawable to bitmap
*
* @param drawable
* @return
*/
public static Bitmap drawableToBitmap(Drawable drawable) {
int w = drawable.getIntrinsicWidth();
int h = drawable.getIntrinsicHeight();
Config config = drawable.getOpacity() != PixelFormat.OPAQUE ? Config.ARGB_8888
: Config.RGB_565;
Bitmap bitmap = Bitmap.createBitmap(w, h, config);
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, w, h);
drawable.draw(canvas);
return bitmap;
}
/**
* Bitmap to drawable
*
* @param bitmap
* @return
*/
public static Drawable bitmapToDrawable(Bitmap bitmap) {
return new BitmapDrawable(bitmap);
}
/**
* Input stream to bitmap
*
* @param inputStream
* @return
* @throws Exception
*/
public static Bitmap inputStreamToBitmap(InputStream inputStream)
throws Exception {
return BitmapFactory.decodeStream(inputStream);
}
/**
* Byte transfer to bitmap
*
* @param byteArray
* @return
*/
public static Bitmap byteToBitmap(byte[] byteArray) {
if (byteArray.length != 0) {
return BitmapFactory
.decodeByteArray(byteArray, 0, byteArray.length);
} else {
return null;
}
}
/**
* Byte transfer to drawable
*
* @param byteArray
* @return
*/
public static Drawable byteToDrawable(byte[] byteArray) {
ByteArrayInputStream ins = null;
if (byteArray != null) {
ins = new ByteArrayInputStream(byteArray);
}
return Drawable.createFromStream(ins, null);
}
/**
* Bitmap transfer to bytes
*
* @param byteArray
* @return
*/
public static byte[] bitmapToBytes(Bitmap bm) {
byte[] bytes = null;
if (bm != null) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
bytes = baos.toByteArray();
}
return bytes;
}
/**
* Drawable transfer to bytes
*
* @param drawable
* @return
*/
public static byte[] drawableToBytes(Drawable drawable) {
BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
Bitmap bitmap = bitmapDrawable.getBitmap();
byte[] bytes = bitmapToBytes(bitmap);
;
return bytes;
}
/**
* Base64 to byte[]
// */
// public static byte[] base64ToBytes(String base64) throws IOException {
// byte[] bytes = Base64.decode(base64);
// return bytes;
// }
//
// /**
// * Byte[] to base64
// */
// public static String bytesTobase64(byte[] bytes) {
// String base64 = Base64.encode(bytes);
// return base64;
// }
/**
* Create reflection images
*
* @param bitmap
* @return
*/
public static Bitmap createReflectionImageWithOrigin(Bitmap bitmap) {
final int reflectionGap = 4;
int w = bitmap.getWidth();
int h = bitmap.getHeight();
Matrix matrix = new Matrix();
matrix.preScale(1, -1);
Bitmap reflectionImage = Bitmap.createBitmap(bitmap, 0, h / 2, w,
h / 2, matrix, false);
Bitmap bitmapWithReflection = Bitmap.createBitmap(w, (h + h / 2),
Config.ARGB_8888);
Canvas canvas = new Canvas(bitmapWithReflection);
canvas.drawBitmap(bitmap, 0, 0, null);
Paint deafalutPaint = new Paint();
canvas.drawRect(0, h, w, h + reflectionGap, deafalutPaint);
canvas.drawBitmap(reflectionImage, 0, h + reflectionGap, null);
Paint paint = new Paint();
LinearGradient shader = new LinearGradient(0, bitmap.getHeight(), 0,
bitmapWithReflection.getHeight() + reflectionGap, 0x70ffffff,
0x00ffffff, TileMode.CLAMP);
paint.setShader(shader);
// Set the Transfer mode to be porter duff and destination in
paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));
// Draw a rectangle using the paint with our linear gradient
canvas.drawRect(0, h, w, bitmapWithReflection.getHeight()
+ reflectionGap, paint);
return bitmapWithReflection;
}
/**
* Get rounded corner images
*
* @param bitmap
* @param roundPx
* 5 10
* @return
*/
public static Bitmap getRoundedCornerBitmap(Bitmap bitmap, float roundPx) {
int w = bitmap.getWidth();
int h = bitmap.getHeight();
Bitmap output = Bitmap.createBitmap(w, h, Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final int color = 0xff424242;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, w, h);
final RectF rectF = new RectF(rect);
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
return output;
}
/**
* Resize the bitmap
*
* @param bitmap
* @param width
* @param height
* @return
*/
public static Bitmap zoomBitmap(Bitmap bitmap, int width, int height) {
int w = bitmap.getWidth();
int h = bitmap.getHeight();
Matrix matrix = new Matrix();
float scaleWidth = ((float) width / w);
float scaleHeight = ((float) height / h);
matrix.postScale(scaleWidth, scaleHeight);
Bitmap newbmp = Bitmap.createBitmap(bitmap, 0, 0, w, h, matrix, true);
return newbmp;
}
/**
* Resize the drawable
* @param drawable
* @param w
* @param h
* @return
*/
public static Drawable zoomDrawable(Drawable drawable, int w, int h) {
int width = drawable.getIntrinsicWidth();
int height = drawable.getIntrinsicHeight();
Bitmap oldbmp = drawableToBitmap(drawable);
Matrix matrix = new Matrix();
float sx = ((float) w / width);
float sy = ((float) h / height);
matrix.postScale(sx, sy);
Bitmap newbmp = Bitmap.createBitmap(oldbmp, 0, 0, width, height,
matrix, true);
return new BitmapDrawable(newbmp);
}
/**
* Get images from SD card by path and the name of image
* @param photoName
* @return
*/
public static Bitmap getPhotoFromSDCard(String path,String photoName){
Bitmap photoBitmap = BitmapFactory.decodeFile(path + "/" +photoName +".png");
if (photoBitmap == null) {
return null;
}else {
return photoBitmap;
}
}
/**
* Check the SD card
* @return
*/
public static boolean checkSDCardAvailable(){
return android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);
}
/**
* Get image from SD card by path and the name of image
* @param fileName
* @return
*/
public static boolean findPhotoFromSDCard(String path,String photoName){
boolean flag = false;
if (checkSDCardAvailable()) {
File dir = new File(path);
if (dir.exists()) {
File folders = new File(path);
File photoFile[] = folders.listFiles();
for (int i = 0; i < photoFile.length; i++) {
String fileName = photoFile[i].getName().split("\\.")[0];
if (fileName.equals(photoName)) {
flag = true;
}
}
}else {
flag = false;
}
// File file = new File(path + "/" + photoName + ".jpg" );
// if (file.exists()) {
// flag = true;
// }else {
// flag = false;
// }
}else {
flag = false;
}
return flag;
}
/**
* Save image to the SD card
* @param photoBitmap
* @param photoName
* @param path
*/
public static void savePhotoToSDCard(Bitmap photoBitmap,String path,String photoName){
if (checkSDCardAvailable()) {
File dir = new File(path);
if (!dir.exists()){
dir.mkdirs();
}
File photoFile = new File(path , photoName + ".png");
FileOutputStream fileOutputStream = null;
try {
fileOutputStream = new FileOutputStream(photoFile);
if (photoBitmap != null) {
if (photoBitmap.compress(Bitmap.CompressFormat.PNG, 100, fileOutputStream)) {
fileOutputStream.flush();
// fileOutputStream.close();
}
}
} catch (FileNotFoundException e) {
photoFile.delete();
e.printStackTrace();
} catch (IOException e) {
photoFile.delete();
e.printStackTrace();
} finally{
try {
fileOutputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
/**
* Delete the image from SD card
* @param context
* @param path
* file:///sdcard/temp.jpg
*/
public static void deleteAllPhoto(String path){
if (checkSDCardAvailable()) {
File folder = new File(path);
File[] files = folder.listFiles();
for (int i = 0; i < files.length; i++) {
files[i].delete();
}
}
}
public static void deletePhotoAtPathAndName(String path,String fileName){
if (checkSDCardAvailable()) {
File folder = new File(path);
File[] files = folder.listFiles();
for (int i = 0; i < files.length; i++) {
System.out.println(files[i].getName());
if (files[i].getName().equals(fileName)) {
files[i].delete();
}
}
}
}
}
注解：
getRootDirectory():是手机内存目录 ;
getExternalStorageDirectory():是内存卡目录;
Context.getFilesDir():本app安装目录;
CameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);//图片保存为临时文件;
实现调用照相机照相，保存在Environment.getRootDirectory().getAbsolutePath() + "/" + sTempFile + ".jpg"
如果手机带存储卡，通过下面可以获取到图片
BitmapFactory.decodeFile(Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + sTempFile + ".jpg");