package com.example.takeorselectpicandencodetostring;
import java.io.ByteArrayOutputStream;
import java.io.File;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BitmapFactory.Options;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
private static final String TAG = "test";
private static final int REQ_ALBUM_ACTIVITY = 100;
private static final int REQ_CAMERA_ACTIVITY = 1001;
private static final String IMAGE_UNSPECIFIED = "image/*";
private File mOutPutFile;
private ImageView mImageViewResult;
private ImageView mImageViewResult2;
private TextView mTextViewResult;
private String mEncodedStr;
private Bitmap mBitmap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.i(TAG, "onCreate");
setContentView(R.layout.activity_main);
findViewById(R.id.btn_select_photo).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
dispatchPickPictureIntent();
}
});
findViewById(R.id.btn_take_photo).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
dispatchTakePictureIntent();
}
});
mImageViewResult = (ImageView) findViewById(R.id.img_result);
mImageViewResult2 = (ImageView) findViewById(R.id.img_result2);
mTextViewResult = (TextView) findViewById(R.id.tv_base64_result);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
Log.i(TAG, "onActivityResult, data=" + data);
switch (requestCode) {
case REQ_CAMERA_ACTIVITY:
handleTakePicResult(requestCode, resultCode, data);
break;
case REQ_ALBUM_ACTIVITY:
handleSelectPicResult(requestCode, resultCode, data);
break;
default:
return;
}
}
protected void handleTakePicResult(int requestCode, int resultCode, Intent data) {
Log.i(TAG, "handleTakePicResult");
if (resultCode == RESULT_OK) {
if (mOutPutFile != null /* && mOutPutFile.length() > 0 */) {
Uri uri = Uri.fromFile(mOutPutFile);
if (uri != null) {
processBitmapAsync(uri);
} else {
FileUtil.deleteFile(mOutPutFile);
}
} else {
FileUtil.deleteFile(mOutPutFile);
}
} else {
FileUtil.deleteFile(mOutPutFile);
}
}
protected void handleSelectPicResult(int requestCode, int resultCode, Intent data) {
Log.i(TAG, "handleSelectPicResult");
if (resultCode == RESULT_OK) {
if (data != null && data.getData() != null) {
Uri uri = data.getData();
if (uri != null) {
processBitmapAsync(uri);
}
} else {
}
} else {
}
}
protected void processBitmapAsync(final Uri uri) {
Log.i(TAG, "processBitmapAsync, uri=" + uri);
new Thread(new Runnable() {
@Override
public void run() {
Log.i(TAG, "processBitmapAsync, run");
processBitmapSync(uri);
}
}).start();
}
private void processBitmapSync(final Uri uri) {
Log.i(TAG, "processBitmapSync, uri=" + uri);
try {
Options opts = new Options();
opts.inPreferredConfig = Bitmap.Config.ARGB_4444;
opts.inJustDecodeBounds = true;
BitmapFactory.decodeStream(getContentResolver().openInputStream(uri), null, opts);
// 图片太小，提示重新选择
if (opts.outHeight < 500 || opts.outWidth < 500) {
Toast.makeText(this, "图片太小，请重新选择", Toast.LENGTH_SHORT).show();
return;
}
Bitmap srcBitmap = null;
// 图片分辨率相对屏幕分辨率的最大倍数
float maxRatio = 0.5f;
{
// 方案2，取inSampleSize
}
// 宽或高超过限定，进行缩放
if (opts.outHeight > ScreenUtil.getHeight() * maxRatio || opts.outWidth > ScreenUtil.getWidth() * maxRatio) {
int heightRatio = Math.round(opts.outHeight / ScreenUtil.getHeight() / maxRatio);
int widthRatio = Math.round(opts.outWidth / ScreenUtil.getWidth() / maxRatio);
Log.i(TAG, "heightRatio=" + heightRatio);
Log.i(TAG, "widthRatio =" + widthRatio);
opts.inJustDecodeBounds = false;
opts.inSampleSize = Math.max(heightRatio, widthRatio);
srcBitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(uri), null, opts);
} else {
// 原始大小
srcBitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(uri), null, opts);
}
// 判断是否需要对图像进行旋转处理
// int degree = BitmapUtils.readPictureDegree(BitmapUtils
// .getRealPathFromUri(getContentResolver(), imageUri));
int degree = ExifUtils.getExifOrientation(this, uri);
if (degree != 0) {
mBitmap = BtsBitmapUtils.rotateBitmap(srcBitmap, degree, true);
// mImageViewResult.setImageBitmap(resBitmap);
encodeBitmapToString(mBitmap);
} else {
// 不需要旋转处理
// mImageViewResult.setImageBitmap(srcBitmap);
mBitmap = srcBitmap;
encodeBitmapToString(srcBitmap);
}
} catch (Exception e) {
e.printStackTrace();
Toast.makeText(this, "文件无法打开", Toast.LENGTH_SHORT).show();
finish();
return;
}
}
@SuppressLint("NewApi")
private void encodeBitmapToString(Bitmap bitmap) {
Log.i(TAG, "encodeBitmapToString");
if (bitmap != null) {
Log.i(TAG, "bitmap.getAllocationByteCount()=" + bitmap.getAllocationByteCount());
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 80, baos);
byte[] b = baos.toByteArray();
mEncodedStr = Base64.encode(b);
updateUI();
FileUtil.deleteFile(mOutPutFile);// finally delete the file
{
UiThreadHandler.postDelayed(new Runnable() {
@Override
public void run() {
byte[] b2 = Base64.decode(mEncodedStr);
Bitmap bitmap2 = BitmapFactory.decodeByteArray(b2, 0, b2.length);
mImageViewResult2.setImageResource(R.drawable.ic_launcher);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
mImageViewResult2.setImageBitmap(bitmap2);
}
}, 3000);
}
}
}
private void updateUI() {
Log.i(TAG, "updateUI");
UiThreadHandler.post(new Runnable() {
@Override
public void run() {
Log.i(TAG, "updateUI, run");
mImageViewResult.setImageBitmap(mBitmap);
// mTextViewResult.setText(mEncodedStr);// consume many time
// Log.i(TAG, "mEncodedStr=" + mEncodedStr);
}
});
}
private void dispatchTakePictureIntent() {
Log.i(TAG, "dispatchTakePictureIntent");
mOutPutFile = FileConfig.getPhotoOutputFile();
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(this.getPackageManager()) != null) {
if (mOutPutFile != null) {
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(mOutPutFile));
startActivityForResult(takePictureIntent, REQ_CAMERA_ACTIVITY);
}
}
}
private void dispatchPickPictureIntent() {
Log.i(TAG, "dispatchPickPictureIntent");
Intent pickPictureIntent = new Intent(Intent.ACTION_PICK, null);
if (pickPictureIntent.resolveActivity(this.getPackageManager()) != null) {
pickPictureIntent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, IMAGE_UNSPECIFIED);
startActivityForResult(pickPictureIntent, REQ_ALBUM_ACTIVITY);
}
}
}