Android实战简易教程-第二十八枪（基于Bmob实现头像图片设置和网络上传功能！）

上一篇我们介绍了怎样由uri转换成String ，本文就用到了上篇文章的方法。以下我们介绍一下怎样设置头像后将头像图片上传到云端的方法，本文基于Bmob提供的服务。

看一下代码：（布局文件和前两篇文章依然一样，不再提供）

package com.example.userphoto;

import java.io.File;

import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
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;
import android.widget.Toast;
import cn.bmob.v3.Bmob;
import cn.bmob.v3.datatype.BmobFile;
import cn.bmob.v3.listener.UploadFileListener;

public class MainActivity extends Activity implements OnClickListener {
	private static final int IMAGE_REQUEST_CODE = 0;
	private static final int CAMERA_REQUEST_CODE = 1;
	private static final int RESIZE_REQUEST_CODE = 2;

	private static final String IMAGE_FILE_NAME = "header.jpg";

	private ImageView mImageHeader;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		Bmob.initialize(this, "8f3ffb2658d8a3366a70a0b0ca0b71b2");//初始化Bmob
		setupViews();
	}

	private void setupViews() {
		mImageHeader = (ImageView) findViewById(R.id.image_header);
		final Button selectBtn1 = (Button) findViewById(R.id.btn_selectimage);
		final Button selectBtn2 = (Button) findViewById(R.id.btn_takephoto);
		selectBtn1.setOnClickListener(this);
		selectBtn2.setOnClickListener(this);
	}

	@Override
	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.btn_selectimage:
			Intent galleryIntent = new Intent(Intent.ACTION_GET_CONTENT);
			galleryIntent.addCategory(Intent.CATEGORY_OPENABLE);
			galleryIntent.setType("image/*");//图片
			startActivityForResult(galleryIntent, IMAGE_REQUEST_CODE);
			break;
		case R.id.btn_takephoto:
			if (isSdcardExisting()) {
				Intent cameraIntent = new Intent(
						"android.media.action.IMAGE_CAPTURE");//拍照
				cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, getImageUri());
				cameraIntent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 0);
				startActivityForResult(cameraIntent, CAMERA_REQUEST_CODE);
			} else {
				Toast.makeText(v.getContext(), "请插入sd卡", Toast.LENGTH_LONG)
						.show();
			}
			break;
		}
	}

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		if (resultCode != RESULT_OK) {
			return;
		} else {
			switch (requestCode) {
			case IMAGE_REQUEST_CODE:
				Uri originalUri=data.getData();//获取图片uri
				resizeImage(originalUri);
				//以下方法将获取的uri转为String类型哦。
				String []imgs1={MediaStore.Images.Media.DATA};//将图片URI转换成存储路径
				Cursor cursor=this.managedQuery(originalUri, imgs1, null, null, null);
				int index=cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
				cursor.moveToFirst();
				String img_url=cursor.getString(index);
				upload(img_url);
				//showToast(img_url);
				break;
			case CAMERA_REQUEST_CODE:
				if (isSdcardExisting()) {
					resizeImage(getImageUri());
					String []imgs={MediaStore.Images.Media.DATA};//将图片URI转换成存储路径
					Cursor cursor1=this.managedQuery(getImageUri(), imgs, null, null, null);
					int index1=cursor1.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
					cursor1.moveToFirst();
					String img_url1=cursor1.getString(index1);
					upload(img_url1);
					//showToast(img_url1);

				} else {
					Toast.makeText(MainActivity.this, "未找到存储卡，无法存储照片！",
							Toast.LENGTH_LONG).show();
				}
				break;

			case RESIZE_REQUEST_CODE:
				if (data != null) {
					showResizeImage(data);
				}
				break;
			}
		}

		super.onActivityResult(requestCode, resultCode, data);
	}
	private void showToast(String msg){
		Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();
	}

	private boolean isSdcardExisting() {//推断SD卡是否存在
		final String state = Environment.getExternalStorageState();
		if (state.equals(Environment.MEDIA_MOUNTED)) {
			return true;
		} else {
			return false;
		}
	}

	public void resizeImage(Uri uri) {//重塑图片大小
		Intent intent = new Intent("com.android.camera.action.CROP");
		intent.setDataAndType(uri, "image/*");
		intent.putExtra("crop", "true");//能够裁剪
		intent.putExtra("aspectX", 1);
		intent.putExtra("aspectY", 1);
		intent.putExtra("outputX", 150);
		intent.putExtra("outputY", 150);
		intent.putExtra("return-data", true);
		startActivityForResult(intent, RESIZE_REQUEST_CODE);
	}

	private void showResizeImage(Intent data) {//显示图片
		Bundle extras = data.getExtras();
		if (extras != null) {
			Bitmap photo = extras.getParcelable("data");
			Drawable drawable = new BitmapDrawable(photo);
			mImageHeader.setImageDrawable(drawable);
		}
	}

	private Uri getImageUri() {//获取路径
		return Uri.fromFile(new File(Environment.getExternalStorageDirectory(),
				IMAGE_FILE_NAME));
	}

	/**
	 * 将图片上传
	 * @param imgpath
	 */
	private void upload(String imgpath){
		final BmobFile icon = new BmobFile(new File(imgpath));
		icon.upload(this, new UploadFileListener() {

			@Override
			public void onSuccess() {
				// TODO Auto-generated method stub
				Person person = new Person();
				person.setIcon(icon);
				person.save(MainActivity.this);
				showToast("图片上传成功");
			}

			@Override
			public void onProgress(Integer arg0) {
				// TODO Auto-generated method stub

			}

			@Override
			public void onFailure(int arg0, String arg1) {
				// TODO Auto-generated method stub
				showToast("图片上传失败："+arg1);
			}
		});
	}
}

javabean类：

package com.example.userphoto;

import cn.bmob.v3.BmobObject;
import cn.bmob.v3.datatype.BmobFile;

public class Person extends BmobObject {
	private BmobFile icon;

	public BmobFile getIcon() {
		return icon;
	}

	public void setIcon(BmobFile icon) {
		this.icon = icon;
	}

}

执行实例，又再次出现故障：

还是权限问题：

然后再执行：

watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />

提示图片上传成功。我们看一下后台：

watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />

watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />

OK，图片已经上传成功喽！是不是非常吊？

欢迎大家转载、交流、点赞、关注！

您的支持是我的动力！！！

！