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4 android调用系统相机并剪切照片
package com.zhao_doubi.photoimage;
import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private static final int CAMERA_RESULT = 123;
private static final int CAMERA_RESULT_CUT = 234;
private static final int CAMERA_RESULT_CUT_OVER = 345;
private Button photo;
private ImageView img;
private String mPhotoPath;
private File mPhotoFile;
private Uri mPhotSDUrl;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
photo = (Button) findViewById(R.id.photo);
img = (ImageView) findViewById(R.id.photo_img);
photo.setOnClickListener(this);
}
@Override
public void onClick(View view) {
if (view.getId() == R.id.photo) {
try {
Intent it = new Intent("android.media.action.IMAGE_CAPTURE");
//保存路径
mPhotoPath = "mnt/sdcard/DCIM/Camera/" + getPhotoFileName();
mPhotoFile = new File(mPhotoPath);
if (!mPhotoFile.exists()){
mPhotoFile.createNewFile();
}
mPhotSDUrl = Uri.fromFile(mPhotoFile);
it.putExtra(MediaStore.EXTRA_OUTPUT,mPhotSDUrl);
//照相的图片
startActivityForResult(it,CAMERA_RESULT);
//剪切后的图片
startActivityForResult(it,CAMERA_RESULT_CUT);
} catch (Exception e) {
e.printStackTrace();
}
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
//拍照后照片
if(requestCode == CAMERA_RESULT){
Bitmap bitmap = BitmapFactory.decodeFile(mPhotoPath,null);
img.setImageBitmap(bitmap);
}
//剪切照片
if (requestCode == CAMERA_RESULT_CUT){
Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE,mPhotSDUrl);
sendBroadcast(intent);
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
}
Uri systemImageUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
ContentResolver contentResolver = getContentResolver();
Cursor cursor = contentResolver.query(systemImageUri, null,
MediaStore.Images.Media.DISPLAY_NAME + "='"
+ mPhotoFile.getName() + "'", null, null);
Uri photoUriInMedia = null;
if (cursor != null && cursor.getCount() > 0) {
cursor.moveToLast();
long id = cursor.getLong(0);
photoUriInMedia = ContentUris.withAppendedId(systemImageUri, id);
}
cursor.close();
Intent in = new Intent("com.android.camera.action.CROP");
//需要裁减的图片格式
in.setDataAndType(photoUriInMedia, "image/*");
//允许裁减
in.putExtra("crop", "true");
//剪裁后ImageView显时图片的宽
in.putExtra("outputX", 250);
//剪裁后ImageView显时图片的高
in.putExtra("outputY", 250);
//设置剪裁框的宽高比例
in.putExtra("aspectX", 1);
in.putExtra("aspectY", 1);
in.putExtra("return-data", true);
startActivityForResult(in, CAMERA_RESULT_CUT_OVER);
}
//放弃剪切
if (requestCode == CAMERA_RESULT_CUT_OVER){
if(data != null){
Bitmap bitmap = (Bitmap) data.getExtras().get("data");
img.setImageBitmap(bitmap);
}
}
}
public String getPhotoFileName() {
Date date = new Date(System.currentTimeMillis());
SimpleDateFormat dateFormat = new SimpleDateFormat("'IMG'_yyyyMMdd_HHmmss");
return dateFormat.format(date) + ".jpg";
}
}