获取头像待修改

imageview显示圆形图片

这里写代码片

从相机中拍照设置头像，并且现在crop为正方形

package com.example.administrator.myapplication;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.widget.ImageView;
import android.widget.Toast;

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

/**
 * Created by shj on 2016/3/7 0007.
 */
public class PhotoActivity extends Activity {
    //拍照
    private static final int TACK_PHOTO = 0;
    //剪裁
    private static final int CROP_PHOTO = 1;
    private Uri imgUri;
    private ImageView iv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.photo);
        iv = (ImageView) findViewById(R.id.iv);
        iv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                File imgFile = new File(Environment.getExternalStorageDirectory(), "select.jpg");
                if (imgFile.exists()) {
                    imgFile.delete();
                }
                try {
                    imgFile.createNewFile();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                imgUri = Uri.fromFile(imgFile);
                Intent imgIntent = new Intent("android.media.action.IMAGE_CAPTURE");
                imgIntent.putExtra(MediaStore.EXTRA_OUTPUT, imgUri);
                startActivityForResult(imgIntent, TACK_PHOTO);
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (requestCode) {
            case TACK_PHOTO:
                if (resultCode == RESULT_OK) {
                    Intent intent = new Intent("com.android.camera.action.CROP");
                    intent.setDataAndType(imgUri, "image/*");
                    intent.putExtra("crop", "true");// crop=true 有这句才能出来最后的裁剪页面.
                    intent.putExtra("aspectX", 1);// 这两项为裁剪框的比例.
                    intent.putExtra("aspectY", 1);// x:y=1:1
                    intent.putExtra("outputX", 200);//图片输出大小
                    intent.putExtra("outputY", 200);
                    intent.putExtra("output", imgUri);
                    intent.putExtra("outputFormat", "JPEG");// 返回格式
                    startActivityForResult(intent, CROP_PHOTO);
                }

                break;
            case CROP_PHOTO:
                if (resultCode == RESULT_OK) {
                    Toast.makeText(PhotoActivity.this, "code", Toast.LENGTH_SHORT).show();
                    try {
                        Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(imgUri));
                        Bitmap b = toRoundCorner(bitmap, 2);
                        iv.setImageBitmap(b);
                    } catch (FileNotFoundException e) {
                        e.printStackTrace();
                    }
                }
                break;
        }
    }
    //将图片变成圆形
    public static Bitmap toRoundCorner(Bitmap bitmap, float ratio) {
        System.out.println("图片是否变成圆形模式了+++++++++++++");
        Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
                bitmap.getHeight(), Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(output);

        final Paint paint = new Paint();
        final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
        final RectF rectF = new RectF(rect);

        paint.setAntiAlias(true);
        canvas.drawARGB(0, 0, 0, 0);
        canvas.drawRoundRect(rectF, bitmap.getWidth() / ratio,
                bitmap.getHeight() / ratio, paint);

        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
        canvas.drawBitmap(bitmap, rect, rect, paint);
        System.out.println("pixels+++++++" + String.valueOf(ratio));

        return output;

    }
}