android camera根据屏幕图像大小设置显示

package com.example.camera;import java.io.File;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.text.format.Time;import android.util.Log;import android.view.Display;import android.widget.ImageView;import android.app.Activity;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.BitmapFactory;public class MainActivity extends Activity {    private final static String TAG="camera";    private final static int CAMERA_RESULT =0;    private ImageView view;    private String imageFilePath;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);                //得到当前系统时间        Time t=new Time();        t.setToNow();        int year=t.year;        int month=t.month;        int day=t.monthDay;        int hour=t.hour;        int minute=t.minute;        int second=t.second;        Log.i(TAG, ""+year+month+day+hour+minute+second);        String filename=""+year+month+day+hour+minute+second;        //得到SD卡的路径也设置文件名        //这里可以简化的写成imageFilePath=Uri.parse("file:////sdcard/my.jpg");        /*imageFilePath=Environment.getExternalStorageDirectory()                .getAbsolutePath()+"/my01.jpg";*/        imageFilePath=Environment.getExternalStorageDirectory()                .getAbsolutePath()+"/"+filename+".jpg";        //创建文件        File file=new File(imageFilePath);        //格式化为Uri        Uri fileImageFilePath=Uri.fromFile(file);        view=(ImageView)findViewById(R.id.imageview);        Intent i=new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);//启动intent        //设置到意图中        i.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, fileImageFilePath);        startActivityForResult(i, CAMERA_RESULT);    }    //返回接收    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        // TODO Auto-generated method stub        super.onActivityResult(requestCode, resultCode, data);        if(resultCode==RESULT_OK){            //以1/8加载原图像的大小            /*BitmapFactory.Options options=new BitmapFactory.Options();            options.inSampleSize=8;            Bitmap bitmap=BitmapFactory.decodeFile(imageFilePath, options);*/                                    /*Bundle bundle=data.getExtras();            Bitmap bitmap=(Bitmap) bundle.get("data");*/                        //            view.setImageBitmap(bitmap);                        //得到图像的大小和显示的大小，动态解压            Display display=getWindowManager().getDefaultDisplay();            int dw=display.getWidth();            int dh=display.getHeight();                        //加载图像            BitmapFactory.Options options=new BitmapFactory.Options();            options.inJustDecodeBounds=true;//设置之后可以设置长宽            Bitmap bitmap=BitmapFactory.decodeFile(imageFilePath, options);                        int heightRatio=(int)Math.ceil(options.outHeight/(float)dh);            int widthRatio=(int)Math.ceil(options.outWidth/(float)dw);                        Log.i(TAG, "heith:"+heightRatio);            Log.i(TAG,"width:"+widthRatio);            //判断长宽哪个大            if(heightRatio>1 && widthRatio>1){                if(heightRatio>widthRatio){                    options.inSampleSize=heightRatio;                }else{                    options.inSampleSize=widthRatio;                }            }            //对它进行真正的解码            options.inJustDecodeBounds=false;            bitmap=BitmapFactory.decodeFile(imageFilePath, options);            view.setImageBitmap(bitmap);                                            }    }  }
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