android 读取并显示本机照片

【实例简介】介绍本地照片的读取显示 拍照
【实例截图】

【核心代码】

package com.gaoqy.imagetext.activity;

import java.io.File;
import java.io.FileNotFoundException;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.view.View.OnClickListener;
import android.webkit.MimeTypeMap;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

import com.gaoqy.imagetext.R;
import com.gaoqy.imagetext.utils.SDCardHelper;

public class CameraActivity extends Activity {
 private Button mStartBtn;
 private ImageView mViewIv;
 private static final int CAMERA = 1001;

 private String path = SDCardHelper.getSDCardDir() File.separator "my" File.separator
    "firstimg.jpg";
 private File file = new File(path);
 private Uri imageUri = Uri.fromFile(file);

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_camera_layout);
  mStartBtn = (Button) findViewById(R.id.start);
  mViewIv = (ImageView) findViewById(R.id.image);

  mStartBtn.setOnClickListener(new OnClickListener() {

   @Override
   public void onClick(View v) {
    getCamera();
   }
  });

 }

 private void getCamera() {
  Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
  intent.putExtra("return-data", false);
     intent.putExtra("crop", "true");  
     intent.putExtra("aspectX", 1);  
     intent.putExtra("aspectY", 1);  
     intent.putExtra("outputX", 1000);  
     intent.putExtra("outputY", 1000);  
     intent.putExtra("scale", true); 
  intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
  intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
  intent.putExtra("noFaceDetection", true);

  startActivityForResult(intent, CAMERA);
 }

 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  if (requestCode == CAMERA) {
   if (imageUri != null) {
    try {
     Bitmap bitmap = BitmapFactory
       .decodeStream(getContentResolver().openInputStream(
         imageUri));

     mViewIv.setImageBitmap(bitmap);
    } catch (FileNotFoundException e) {
     e.printStackTrace();
    }
   }
  }
  super.onActivityResult(requestCode, resultCode, data);
 }

 private void setScaleImage(Bitmap photo, int scale) {

  if (photo != null) {
   Matrix matrix = new Matrix();
   matrix.postScale(2, 2);
   Bitmap bitmap = Bitmap.createBitmap(photo, 0, 0, photo.getWidth(),
     photo.getHeight(), matrix, true);
   
   mViewIv.setImageBitmap(bitmap);
   photo.recycle();

   // Toast.makeText(CameraActivity.this,
   // "OK!!!",Toast.LENGTH_LONG).show();
  } else {
   Toast.makeText(CameraActivity.this, "!---no", Toast.LENGTH_LONG)
     .show();
  }
 }

}