android - 如何在 android 中制作带有图像的自定义网格？

Question

我想制作一个自定义网格，其中包含我们通常在 android 手机中看到的图片库

我已经找了几个小时了。但运气不好，最后我试图在这里提问。有人可以建议我如何实现这种 GridView 。还是我需要遵循任何其他方法？

Answer 1

查看 ma​​in.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。

重要提示

如果你的最低 SDK 版本是 11 而不是使用属性 android:rotation="20"bcz 它从 API 级别 11 开始可用所以如果你想运行它比使用低版本适配器类中描述的旋转代码

假设我已将 ImageView 大小固定为 100dp*100dp，如果我将旋转设置为

android:rotation="20" 

很明显，我们的图像会在 GridView 中从底部和顶部剪切，因此根据旋转设置边距。

ma​​in.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>

griditem.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 Activity

 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);
    }
}
}