下面是效果图,看看是不是亲想要的效果图,如果是,这段代码你就可以参考下了,但是要灵活运用,根据需求做相应的改动。
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <Button android:id="@+id/take_photo" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Take Photo" /> <Button android:id="@+id/get_photo" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="get Photo" /> <ImageView android:id="@+id/picture" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" /> </LinearLayout>
package com.example.choosepictest;
import java.io.File; import java.io.IOException; import android.app.Activity; import android.content.Intent; import android.graphics.Bitmap; 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.Button; import android.widget.ImageView; public class MainActivity extends Activity implements OnClickListener { public static final int TAKE_PHOTO = 1; public static final int CROP_PHOTO = 2; public static final int GET_PHOTO = 3; private Button takePhoto; private Button getPhoto; private ImageView picture; private Uri headImgUri; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); takePhoto = (Button) findViewById(R.id.take_photo); getPhoto = (Button) findViewById(R.id.get_photo); picture = (ImageView) findViewById(R.id.picture); takePhoto.setOnClickListener(this); getPhoto.setOnClickListener(this); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.take_photo: takePhoto(); break; case R.id.get_photo: getPhoto(); break; default: break; } } // 拍照 private void takePhoto() { File appDir = new File(Environment.getExternalStorageDirectory(), "/etoury/picCache"); if (!appDir.exists()) { appDir.mkdir(); } String fileName = "user_head" + ".jpg"; File outputImage = new File(appDir, fileName); try { if (outputImage.exists()) { outputImage.delete(); } outputImage.createNewFile(); } catch (IOException e) { e.printStackTrace(); } headImgUri = Uri.fromFile(outputImage); Intent intent = new Intent("android.media.action.IMAGE_CAPTURE"); intent.putExtra(MediaStore.EXTRA_OUTPUT, headImgUri); startActivityForResult(intent, TAKE_PHOTO); } // 定向到图片库 private void getPhoto() { Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); startActivityForResult(intent, GET_PHOTO); } /** * 裁剪 */ private void crop(Uri uri) { // 裁剪图片意图 Intent intent = new Intent("com.android.camera.action.CROP"); intent.setDataAndType(uri, "image/*"); // 下面这个crop=true是设置在开启的Intent中设置显示的VIEW可裁剪 intent.putExtra("crop", "true"); intent.putExtra("scale", true);// 去黑边 // 裁剪框的比例,1:1 intent.putExtra("aspectX", 1);// 输出是X方向的比例 intent.putExtra("aspectY", 1); // 裁剪后输出图片的尺寸大小,不能太大500程序崩溃 intent.putExtra("outputX", 256); intent.putExtra("outputY", 256); // 图片格式 /* intent.putExtra("outputFormat", "JPEG"); */ intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString()); // intent.putExtra("noFaceDetection", true);// 取消人脸识别 intent.putExtra("return-data", true);// true:返回uri,false:不返回uri // 同一个地址下 裁剪的图片覆盖拍照的图片 intent.putExtra(MediaStore.EXTRA_OUTPUT, headImgUri); startActivityForResult(intent, CROP_PHOTO); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { switch (requestCode) { case GET_PHOTO: if (resultCode == RESULT_OK) { crop(data.getData()); } break; case TAKE_PHOTO: if (resultCode == RESULT_OK) { crop(headImgUri); } break; case CROP_PHOTO: if (resultCode == RESULT_OK) { Bitmap cropbitmap = data.getParcelableExtra("data"); picture.setImageBitmap(cropbitmap); } break; default: break; } } }
总结:
1. 拍照返回一张图片,可以是全尺寸的图片
2. 拍照返回图片的地址问题,一个目录下的一个文件
3. 裁剪的图片的地址, 覆盖了全尺寸图片的地址
4. 相册intent 返回的是一个uir , 不是string
5. 裁剪的图片,不能覆盖相册返回的uri(一定注意)