android - 如何在 android 中使用图像制作自定义网格？

Question

我想custom grid用我们通常在 android 手机中看到的画廊的图像制作一个

我已经搜索了几个小时。但是没有运气，最后我试图在这里提问。有人可以建议我如何实现这种网格视图。还是我需要遵循任何其他方法？

Answer 1

查看main.xml和griditem.xml的代码，我们只需根据我们设置的旋转设置 imageview 和边距的旋转。

重要的提示

如果您的最低 SDK 版本是 11，则使用属性android:rotation="20" bcz 它从 API 级别 11 开始可用，因此如果您想运行它的版本低于使用适配器类中描述的旋转代码

假设我有固定的ImageView大小 100dp*100dp 并且如果我将旋转设置为

android:rotation="20" 

很明显，我们的图像会在网格视图中从底部和顶部切下，所以根据旋转设置它的边距。

主要的.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
 >
<GridView
    android:id="@+id/gridView1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:horizontalSpacing="10dp"
    android:numColumns="auto_fit">
</GridView>
</RelativeLayout>

网格项目.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="#000">
<RelativeLayout 
   android:layout_width="match_parent"
   android:layout_height="150dp">
<ImageView
    android:id="@+id/imageView1"
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:layout_alignParentTop="true"
    android:layout_marginTop="20dp"
    android:layout_marginLeft="30dp"
    android:src="@drawable/image1" />
<ImageView
    android:id="@+id/imageView2"
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:layout_marginLeft="40dp"
    android:layout_marginTop="20dp"
    android:src="@drawable/image2" />
<ImageView
    android:id="@+id/imageView3"
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:layout_marginLeft="50dp"
    android:layout_marginTop="20dp"
    android:src="@drawable/image3" />
<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Large Text"
    android:textStyle="bold"
    android:textColor="#fff"
     />
</RelativeLayout>
</RelativeLayout>

主要活动

 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.graphics.Matrix;
 import android.os.Build;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.BaseAdapter;
 import android.widget.GridView;
 import android.widget.ImageView;
 import android.widget.TextView;


 @TargetApi(Build.VERSION_CODES.HONEYCOMB)
 public class MainActivity extends Activity{
String[] logtag=new String[]{"Log.e","Log.d","Log.i"};
GridView gv;
GridAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    gv=(GridView)findViewById(R.id.gridView1);
    adapter=new GridAdapter(this);
    gv.setAdapter(adapter);


}
class GridAdapter extends BaseAdapter{
    LayoutInflater lf;
    Context context;

    public  GridAdapter(MainActivity activity) {
        // TODO Auto-generated method stub
        context=activity;
        lf=(LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }
    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return logtag.length;
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        ViewHolder viewHolder;
        if(convertView==null){
            viewHolder=new ViewHolder();
            convertView=lf.inflate(R.layout.griditem, null);
            viewHolder.image1=(ImageView)convertView.findViewById(R.id.imageView1);
            viewHolder.image2=(ImageView)convertView.findViewById(R.id.imageView2);
            viewHolder.image3=(ImageView)convertView.findViewById(R.id.imageView3);
            viewHolder.text=(TextView)convertView.findViewById(R.id.textView1);
            convertView.setTag(viewHolder);
        }else{
            viewHolder=(ViewHolder) convertView.getTag();
        }
        if(android.os.Build.VERSION.SDK_INT < 11){
        RotateBitmap(viewHolder.image1,R.drawable.image1);
        RotateBitmap(viewHolder.image2,R.drawable.image2);
        RotateBitmap(viewHolder.image3,R.drawable.image3);
        }else{
            viewHolder.image1.setRotation(20);
            viewHolder.image2.setRotation(20);
            viewHolder.image3.setRotation(20);
        }
        viewHolder.text.setText(logtag[position]);
        return convertView;
    }
    class ViewHolder{
        ImageView image1;
        ImageView image2;
        ImageView image3;
        TextView text;
    }
    public void RotateBitmap(ImageView imageView, int imageid){
        Bitmap myImg = BitmapFactory.decodeResource(getResources(),imageid);
        Matrix matrix = new Matrix();
        matrix.postRotate(20);
        Bitmap rotated = Bitmap.createBitmap(myImg, 0, 0, myImg.getWidth(), myImg.getHeight(),matrix, true);
        imageView.setImageBitmap(rotated);
    }
}
}

Answer 2

FrameLayout用 3ImageView为网格项创建一个。然后在您的类中使用以下代码BaseAdapter来旋转ImageView's.

Matrix matrix=new Matrix();
imageView.setScaleType(ScaleType.MATRIX);   //required
matrix.postRotate((float) angle, pivX, pivY);
imagView.setImageMatrix(matrix);

添加必要的边距以分隔ImageView

Answer 3

查看项目ImageBlock源代码中的类。这些s 被管理并放入s 中。Android ImageGalleryImageBlockGridViewSpecial

Answer 4

您可以使用以下代码从中心点旋转图像

Bitmap targetBitmap = Bitmap.createBitmap(targetWidth, targetHeight, config);
Canvas canvas = new Canvas(targetBitmap);
Matrix matrix = new Matrix();
matrix.setRotate(mRotation,source.getWidth()/2,source.getHeight()/2);
canvas.drawBitmap(source, matrix, new Paint());