android读取相册加载本地图片制成头像

于 2017-07-07 20:10:31 发布
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分类专栏： android 文章标签： android button circle 读取相册 加载图片
版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。
本文链接：https://blog.youkuaiyun.com/Mr_Wxb/article/details/74779596
这篇博客介绍了如何在Android应用中通过点击事件从相册选取图片，并使用setImageBitmap方法将其加载为圆形头像。同时，提供了布局文件、按钮样式代码以及相关的资源文件选择器XML代码。完整代码可在GitHub仓库https://github.com/ForeverloveWY/Mr.Wei找到。
  • 这是点击popupwindows的点击事件
case R.id.tv_pick_phone:
                Toast.makeText(getActivity(), "从手机相册选择", Toast.LENGTH_SHORT).show();
                popupWindow.dismiss();
                Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                startActivityForResult(intent,1);
                break;

这里写图片描述

  • 点击

这里写图片描述

  • 实现代码（选择图片并进行setImageBitmap加载）
@Override
    public void onDismiss() {
        setBackgroundAlpha(1);
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        //获取图片路径
        if (requestCode == CAMERA_REQUEST_CODE && resultCode == Activity.RESULT_OK && data != null) {
            Uri selectedImage = data.getData();
            String[] filePathColumns = {MediaStore.Images.Media.DATA};
            String path = getImagePath(selectedImage,null);
            Cursor c = getActivity().getContentResolver().query(selectedImage, filePathColumns, null, null, null);
            c.moveToFirst();
            int index=c.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            String imagePath = c.getString(index);
            showImage(imagePath);
            //upload(imagePath);上传功能还没实现
            c.close();
        }
    }

    //加载图片
    private void showImage(String imagePath){
        Bitmap bm = BitmapFactory.decodeFile(imagePath);
        ((ImageView)getActivity().findViewById(R.id.head)).setImageBitmap(bm);
    }


    private String getImagePath(Uri uri, String seletion) {
        String path = null;
        Cursor cursor = getActivity().getContentResolver().query(uri, null, seletion, null, null);
        if (cursor != null) {
            if (cursor.moveToFirst()) {
                path = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DATA));
            }
            cursor.close();
        }
        return path;
    }

这里写图片描述

  • 贴上圆形头像代码
public class CircleImageView extends android.support.v7.widget.AppCompatImageView {

    private static final ScaleType SCALE_TYPE = ScaleType.CENTER_CROP;

    private static final Bitmap.Config BITMAP_CONFIG = Bitmap.Config.ARGB_8888;
    private static final int COLORDRAWABLE_DIMENSION = 1;

    private static final int DEFAULT_BORDER_WIDTH = 0;
    private static final int DEFAULT_BORDER_COLOR = Color.BLACK;

    private final RectF mDrawableRect = new RectF();
    private final RectF mBorderRect = new RectF();

    private final Matrix mShaderMatrix = new Matrix();
    private final Paint mBitmapPaint = new Paint();
    private final Paint mBorderPaint = new Paint();

    private int mBorderColor = DEFAULT_BORDER_COLOR;
    private int mBorderWidth = DEFAULT_BORDER_WIDTH;

    private Bitmap mBitmap;
    private BitmapShader mBitmapShader;
    private int mBitmapWidth;
    private int mBitmapHeight;

    private float mDrawableRadius;
    private float mBorderRadius;

    private boolean mReady;
    private boolean mSetupPending;

    public CircleImageView(Context context) {
        super(context);
    }

    public CircleImageView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public CircleImageView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        super.setScaleType(SCALE_TYPE);

        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CircleImageView, defStyle, 0);

        mBorderWidth = a.getDimensionPixelSize(R.styleable.CircleImageView_border_width, DEFAULT_BORDER_WIDTH);
        mBorderColor = a.getColor(R.styleable.CircleImageView_border_color, DEFAULT_BORDER_COLOR);

        a.recycle();

        mReady = true;

        if (mSetupPending) {
            setup();
            mSetupPending = false;
        }
    }

    @Override
    public ScaleType getScaleType() {
        return SCALE_TYPE;
    }

    @Override
    public void setScaleType(ScaleType scaleType) {
        if (scaleType != SCALE_TYPE) {
            throw new IllegalArgumentException(String.format("ScaleType %s not supported.", scaleType));
        }
    }

    @Override
    protected void onDraw(Canvas canvas) {
        if (getDrawable() == null) {
            return;
        }

        canvas.drawCircle(getWidth() / 2, getHeight() / 2, mDrawableRadius, mBitmapPaint);
        canvas.drawCircle(getWidth() / 2, getHeight() / 2, mBorderRadius, mBorderPaint);
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        setup();
    }

    public int getBorderColor() {
        return mBorderColor;
    }

    public void setBorderColor(int borderColor) {
        if (borderColor == mBorderColor) {
            return;
        }

        mBorderColor = borderColor;
        mBorderPaint.setColor(mBorderColor);
        invalidate();
    }

    public int getBorderWidth() {
        return mBorderWidth;
    }

    public void setBorderWidth(int borderWidth) {
        if (borderWidth == mBorderWidth) {
            return;
        }

        mBorderWidth = borderWidth;
        setup();
    }

    @Override
    public void setImageBitmap(Bitmap bm) {
        super.setImageBitmap(bm);
        mBitmap = bm;
        setup();
    }

    @Override
    public void setImageDrawable(Drawable drawable) {
        super.setImageDrawable(drawable);
        mBitmap = getBitmapFromDrawable(drawable);
        setup();
    }

    @Override
    public void setImageResource(int resId) {
        super.setImageResource(resId);
        mBitmap = getBitmapFromDrawable(getDrawable());
        setup();
    }

    private Bitmap getBitmapFromDrawable(Drawable drawable) {
        if (drawable == null) {
            return null;
        }

        if (drawable instanceof BitmapDrawable) {
            return ((BitmapDrawable) drawable).getBitmap();
        }

        try {
            Bitmap bitmap;

            if (drawable instanceof ColorDrawable) {
                bitmap = Bitmap.createBitmap(COLORDRAWABLE_DIMENSION, COLORDRAWABLE_DIMENSION, BITMAP_CONFIG);
            } else {
                bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), BITMAP_CONFIG);
            }

            Canvas canvas = new Canvas(bitmap);
            drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
            drawable.draw(canvas);
            return bitmap;
        } catch (OutOfMemoryError e) {
            return null;
        }
    }

    private void setup() {
        if (!mReady) {
            mSetupPending = true;
            return;
        }

        if (mBitmap == null) {
            return;
        }

        mBitmapShader = new BitmapShader(mBitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);

        mBitmapPaint.setAntiAlias(true);
        mBitmapPaint.setShader(mBitmapShader);

        mBorderPaint.setStyle(Paint.Style.STROKE);
        mBorderPaint.setAntiAlias(true);
        mBorderPaint.setColor(mBorderColor);
        mBorderPaint.setStrokeWidth(mBorderWidth);

        mBitmapHeight = mBitmap.getHeight();
        mBitmapWidth = mBitmap.getWidth();

        mBorderRect.set(0, 0, getWidth(), getHeight());
        mBorderRadius = Math.min((mBorderRect.height() - mBorderWidth) / 2, (mBorderRect.width() - mBorderWidth) / 2);

        mDrawableRect.set(mBorderWidth, mBorderWidth, mBorderRect.width() - mBorderWidth, mBorderRect.height() - mBorderWidth);
        mDrawableRadius = Math.min(mDrawableRect.height() / 2, mDrawableRect.width() / 2);

        updateShaderMatrix();
        invalidate();
    }

    private void updateShaderMatrix() {
        float scale;
        float dx = 0;
        float dy = 0;

        mShaderMatrix.set(null);

        if (mBitmapWidth * mDrawableRect.height() > mDrawableRect.width() * mBitmapHeight) {
            scale = mDrawableRect.height() / (float) mBitmapHeight;
            dx = (mDrawableRect.width() - mBitmapWidth * scale) * 0.5f;
        } else {
            scale = mDrawableRect.width() / (float) mBitmapWidth;
            dy = (mDrawableRect.height() - mBitmapHeight * scale) * 0.5f;
        }

        mShaderMatrix.setScale(scale, scale);
        mShaderMatrix.postTranslate((int) (dx + 0.5f) + mBorderWidth, (int) (dy + 0.5f) + mBorderWidth);

        mBitmapShader.setLocalMatrix(mShaderMatrix);
    }

}

然后在布局里使用

<com.bo.friends.circle.CircleImageView
        android:id="@+id/head"
        android:layout_width="120dp"
        android:layout_height="120dp"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="75dp" />
  • 按钮样式代码
    drawable\button.xml 
<?xml version="1.0" encoding="utf-8"?>
<selector
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item  android:state_pressed="false"
        android:drawable="@drawable/sign_seletor_nopressed"/>
    <item  android:state_pressed="true"
        android:drawable="@drawable/sign_seletor_pressed"/>
</selector>

drawable\sign_seletor_nopressed.xml

<?xml version="1.0" encoding="UTF-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- 连框颜色值 --><item>
    <shape>
        <solid android:color="#17abe3" />
        <corners android:radius="20dp" />

    </shape>
</item>
    <!-- 主体背景颜色值 -->
    <item android:bottom="1dp" android:right="1dp" android:top="1dp" android:left="1dp">
        <shape>
            <gradient android:startColor="#ffffff" android:centerColor="#ffffff"
                android:endColor="#ffffff" android:type="linear" android:angle="90"
                android:centerX="0.5" android:centerY="0.5" />

            <padding android:left="2dp" android:top="2dp" android:right="2dp"
                android:bottom="2dp" />
            <!-- 应该是圆角 -->
            <corners android:radius="20dp" />
        </shape>
    </item>
</layer-list>

drawable\sign_seletor_pressed.xml

<?xml version="1.0" encoding="UTF-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- 连框颜色值 --><item>
    <shape>
        <solid android:color="#17abe3" />
        <corners android:radius="20dp" />

    </shape>
</item>
    <!-- 主体背景颜色值 -->
    <item android:bottom="1dp" android:right="1dp" android:top="1dp" android:left="1dp">
        <shape>
            <gradient android:startColor="#7bbfea" android:centerColor="#7bbfea"
                android:endColor="#7bbfea" android:type="linear" android:angle="90"
                android:centerX="0.5" android:centerY="0.5" />

            <padding android:left="2dp" android:top="2dp" android:right="2dp"
                android:bottom="2dp" />
            <!-- 应该是圆角 -->
            <corners android:radius="20dp" />
        </shape>
    </item>
</layer-list>

附上github地址：https://github.com/ForeverloveWY/Mr.Wei

新手上路，努力学习中

Github才写了一点点，每天打卡，激励自己一直学习下去

毕竟，我已经找到了(ˇˍˇ) 那个想养一辈子的人啊

这里写图片描述

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