package com.example.thinkpad.camera; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.media.ImageWriter; import android.net.Uri; import android.os.Build; import android.provider.MediaStore; import android.support.v4.content.FileProvider; 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.io.FileNotFoundException; import java.io.IOException; public class MainActivity extends AppCompatActivity { public static final int TAKE_PHOTO=1; private ImageView picture; private Uri imageUri; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button takePhoto =(Button) findViewById(R.id.take_photo); picture =(ImageView) findViewById(R.id.pictrue); takePhoto.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //创建File对象,用于存储拍照后的图片 File outputImage =new File(getExternalCacheDir(),"output_image.jpg"); try{ if(outputImage.exists()){ outputImage.delete(); } outputImage.createNewFile(); }catch (IOException e){ e.printStackTrace(); } if(Build.VERSION.SDK_INT>=24){ imageUri= FileProvider.getUriForFile(MainActivity.this,"com.example.cameraalbumtest.fileprovider",outputImage); }else{ imageUri=Uri.fromFile(outputImage); } //启动相机程序 Intent intent=new Intent("android.media.action.IMAGE_CAPTURE"); intent.putExtra(MediaStore.EXTRA_OUTPUT,imageUri); startActivityForResult(intent,TAKE_PHOTO); } }); } protected void onActivityResult(int requestCode,int resultCode,Intent data){ switch(requestCode){ case TAKE_PHOTO: if(resultCode==RESULT_OK){ try{ //将拍摄的照片显示出来 Bitmap bitmap= BitmapFactory.decodeStream(getContentResolver().openInputStream(imageUri)); picture.setImageBitmap(bitmap); }catch (FileNotFoundException e){ e.printStackTrace(); } } break; default: break; } } }
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent" > <Button android:id="@+id/take_photo" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Take Photo"/> <ImageView android:id="@+id/pictrue" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal"/> </LinearLayout>
在res下新建一个xml,在xml下新建一个file_paths.xml。
<?xml version="1.0" encoding="utf-8"?> <paths xmlns:android="http://schemas.android.com/apk/res/android"> <external-path name="my_images" path=""/> </paths>
AndroidManifest.xml文件
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.thinkpad.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"> <provider android:authorities="com.example.cameraalbumtest.fileprovider" android:name="android.support.v4.content.FileProvider" android:exported="false" android:grantUriPermissions="true"> <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/file_paths"/> </provider> <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>