1.第一步在androidmanifest。xml中注册
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
2.第二步创建activity_creama.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context="com.cqytjr.www.networkreceiver.CramaActivity">
<Button
android:id="@+id/btn_creama"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:text="@string/hello_world"
tools:context=".CramaActivity" />
<ImageView
android:id="@+id/img_creama"
android:layout_width="150dip"
android:layout_height="150dip"
android:layout_margin="15dip"
android:layout_centerHorizontal="true"
android:layout_below="@+id/btn_creama"
android:scaleType="fitXY"
/>
<TextView
android:id="@+id/text"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/img_creama"
android:textSize="16sp"
android:background="#22000000"
/>
</RelativeLayout>
3. 第三步创建cramaactivity
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
public class CramaActivity extends Activity {
private Button creama=null;
private ImageView img=null;
private TextView text=null;
private File tempFile = new File(Environment.getExternalStorageDirectory(),
getPhotoFileName());
private static final int PHOTO_REQUEST_TAKEPHOTO = 1;// 拍照
private static final int PHOTO_REQUEST_GALLERY = 2;// 从相册中选择
private static final int PHOTO_REQUEST_CUT = 3;// 结果
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_crama);
init();
Log.i("TAG-->", ""+Environment.getExternalStorageDirectory());
}
private void init() {
// TODO Auto-generated method stub
creama=(Button) findViewById(R.id.btn_creama);
img=(ImageView) findViewById(R.id.img_creama);
creama.setOnClickListener(listener);
text=(TextView) findViewById(R.id.text);
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case PHOTO_REQUEST_TAKEPHOTO:// 当选择拍照时调用
startPhotoZoom(Uri.fromFile(tempFile));
break;
case PHOTO_REQUEST_GALLERY:// 当选择从本地获取图片时
// 做非空判断，当我们觉得不满意想重新剪裁的时候便不会报异常，下同
if (data != null)
startPhotoZoom(data.getData());
break;
case PHOTO_REQUEST_CUT:// 返回的结果
if (data != null)
// setPicToView(data);
sentPicToNext(data);
break;
}
super.onActivityResult(requestCode, resultCode, data);
}
private OnClickListener listener = new OnClickListener(){
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent cameraintent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// 指定调用相机拍照后照片的储存路径
cameraintent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(tempFile));
startActivityForResult(cameraintent, PHOTO_REQUEST_TAKEPHOTO);
}};
private void startPhotoZoom(Uri uri) {
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setDataAndType(uri, "image/*");
// crop为true是设置在开启的intent中设置显示的view可以剪裁
intent.putExtra("crop", "true");
// aspectX aspectY 是宽高的比例
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
// outputX,outputY 是剪裁图片的宽高
intent.putExtra("outputX", 300);
intent.putExtra("outputY", 300);
intent.putExtra("return-data", true);
intent.putExtra("noFaceDetection", true);
startActivityForResult(intent, PHOTO_REQUEST_CUT);
}
// 将进行剪裁后的图片传递到下一个界面上
private void sentPicToNext(Intent picdata) {
Bundle bundle = picdata.getExtras();
if (bundle != null) {
Bitmap photo = bundle.getParcelable("data");
if (photo==null) {
img.setImageResource(R.drawable.ic_launcher);
}else {
img.setImageBitmap(photo);
// 设置文本内容为 图片绝对路径和名字
text.setText(tempFile.getAbsolutePath());
}
ByteArrayOutputStream baos = null;
try {
baos = new ByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.JPEG, 100, baos);
byte[] photodata = baos.toByteArray();
System.out.println(photodata.toString());
// Intent intent = new Intent();
// intent.setClass(RegisterActivity.this, ShowActivity.class);
// intent.putExtra("photo", photodata);
// startActivity(intent);
// finish();
} catch (Exception e) {
e.getStackTrace();
} finally {
if (baos != null) {
try {
baos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
}
// 使用系统当前日期加以调整作为照片的名称
private String getPhotoFileName() {
Date date = new Date(System.currentTimeMillis());
SimpleDateFormat dateFormat = new SimpleDateFormat(
"'IMG'_yyyyMMdd_HHmmss");
return dateFormat.format(date) + ".jpg";
}
}
第二种方式，我们不需要剪裁，直接用：
androidmanifest注册
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
第二部：
xml文件添加一个imageview
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/ic_launcher"
android:id="@+id/imageView"/>
activity代码
public class MainActivity extends Activity {
GridView gridView;
ImageView imageView;
private Bitmap bitmap;
final static int REQUEST_CODE_PICK_IMAGE = 1;
final static int REQUEST_CODE_CAPTURE_CAMEIA = 2;
protected void getImageFromAlbum() {
Intent intent = new Intent(Intent.ACTION_PICK);
intent.setType("image/*");//相片类型
startActivityForResult(intent, REQUEST_CODE_PICK_IMAGE);
}
protected void getImageFromCamera() {
String state = Environment.getExternalStorageState();
if (state.equals(Environment.MEDIA_MOUNTED)) {
Intent getImageByCamera = new Intent("android.media.action.IMAGE_CAPTURE");
startActivityForResult(getImageByCamera, REQUEST_CODE_CAPTURE_CAMEIA);
}
else {
Toast.makeText(getApplicationContext(), "请确认已经插入SD卡", Toast.LENGTH_LONG).show();
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
// gridView = (GridView)findViewById(R.id.grid_view);
imageView = (ImageView) findViewById(R.id.imageView);
imageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
getImageFromAlbum();
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_CODE_PICK_IMAGE) {
Uri uri = data.getData();
// Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), uri);
try {
Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(),uri);
imageView.setImageBitmap(bitmap);
} catch (IOException e) {
e.printStackTrace();
}
} else if (requestCode == REQUEST_CODE_CAPTURE_CAMEIA ) {
Bundle extras = data.getExtras();
Bitmap map = (Bitmap)extras.get("data");
imageView.setImageBitmap(map);
} }
}