废话不多说了，直接给大家贴代码了，具体代码如下所示：
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<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="300dp" android:layout_height="300dp" android:layout_gravity="center_horizontal" /></LinearLayout>package com.example.choosepictest;import java.io.File;import java.io.IOException;import java.text.SimpleDateFormat;import java.util.Date;import android.app.Activity;import android.content.Intent;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.Button;import android.widget.ImageView;public class MainActivity extends Activity implements OnClickListener { static final int REQUEST_IMAGE_CAPTURE = 1; private Button takePhoto; private Button getPhoto; private ImageView picture; private Uri imgUri; @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: dispatchTakePictureIntent(); break; default: break; } } // 保存全尺寸照片 String mCurrentPhotoPath; private void dispatchTakePictureIntent() { File appDir = new File(Environment.getExternalStorageDirectory(), "/etoury/picCache"); if (!appDir.exists()) { appDir.mkdir(); } String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss") .format(new Date()); String fileName = timeStamp + ".jpg"; File outputImage = new File(appDir, fileName); try { if (outputImage.exists()) { outputImage.delete(); } outputImage.createNewFile(); } catch (IOException e) { e.printStackTrace(); } mCurrentPhotoPath = outputImage.getAbsolutePath(); imgUri = Uri.fromFile(outputImage); // 意图 相机 Intent intent = new Intent("android.media.action.IMAGE_CAPTURE"); intent.putExtra(MediaStore.EXTRA_OUTPUT, imgUri); // 如果有相机 if (intent.resolveActivity(getPackageManager()) != null) { startActivityForResult(intent, REQUEST_IMAGE_CAPTURE); } } //解码缩放图片(Decode a Scaled Image) private void setPic() { // Get the dimensions of the View int targetW = picture.getWidth(); int targetH = picture.getHeight(); // Get the dimensions of the bitmap BitmapFactory.Options bmOptions = new BitmapFactory.Options(); // 该 值设为true那么将不返回实际的bitmap，也不给其分配内存空间这样就避免内存溢出了。但是允许我们查询图片的信息这其中就包括图片大小信息 bmOptions.inJustDecodeBounds = true; BitmapFactory.decodeFile(mCurrentPhotoPath, bmOptions); int photoW = bmOptions.outWidth; int photoH = bmOptions.outHeight; // Determine how much to scale down the image // Math.min求最小值 int scaleFactor = Math.min(photoW/targetW, photoH/targetH); // Decode the image file into a Bitmap sized to fill the View bmOptions.inJustDecodeBounds = false; // 设置恰当的inSampleSize可以使BitmapFactory分配更少的空间以消除该错误 bmOptions.inSampleSize = scaleFactor; // 如果inPurgeable设为True的话表示使用BitmapFactory创建的Bitmap,用于存储Pixel的内存空间在系统内存不足时可以被回收 bmOptions.inPurgeable = true; Bitmap bitmap = BitmapFactory.decodeFile(mCurrentPhotoPath, bmOptions); picture.setImageBitmap(bitmap); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (resultCode == RESULT_OK) { switch (requestCode) { case REQUEST_IMAGE_CAPTURE: setPic(); break; default: break; } } }} |
以上代码就是本文给大家介绍的Android拍照得到全尺寸图片并进行压缩 的全部内容，希望大家喜欢。
