拍照 裁剪 相册选取
package com.ryantang.picture;
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);
}
}
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