我想要在使用ImageView類的GridView佈局內佈局8x8網格圖像,實際上只是40x40px圖標。使用ImageView和GridView設置顯示在行和列中的圖像數量
我試圖玩弄的setLayoutParams和ImageView的類的setScaleType方法,但一直沒能達到預期的影響。這是我的,但我正在試驗只有一個3x3的小圖標網格,直到我掌握它。
主要Acitvity:
package com.topherwilso.ropasci;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.GridView;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
GridView gv = (GridView) findViewById(R.id.gridview);
gv.setAdapter(new ImageAdapter(getApplicationContext()));
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
而且我ImageAdapter類:
package com.topherwilso.ropasci;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
public class ImageAdapter extends BaseAdapter {
int[] images = {
R.drawable.one, R.drawable.two,
R.drawable.three, R.drawable.four,
R.drawable.five, R.drawable.six,
R.drawable.seven, R.drawable.eight,
R.drawable.nine
};
private Context context;
public ImageAdapter(Context applicationContext){
context=applicationContext;
}
@Override
public int getCount() {
//Number of data elements to be displayed
return images.length;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView iv;
if(convertView != null){
iv = (ImageView) convertView;
}
else{
iv = new ImageView(context);
iv.setLayoutParams(new GridView.LayoutParams(120, 120));
iv.setScaleType(ScaleType.CENTER);
iv.setPadding(0, 0, 0, 0);
}
iv.setImageResource(images[position]);
return iv;
}
}
這是什麼樣子,現在,
這就是我想,
http://stackoverflow.com/questions/7298731/when-to-call-activity-context-or-application-context。使用活動的上下文 – Raghunandan 2013-04-20 06:40:49
感謝您的文章,我得到他們在說什麼,但我不知道如何在我的代碼中實現它。我試過「iv = new ImageView(MainActivity.getActivityContext());」,「iv = new ImageView(MaintActivity);」,「iv = new ImageView(this);」但沒有任何工作。 – ChrisWilson4 2013-04-20 07:16:18
上面的鏈接用於瞭解何時使用getApplicationContext()以及何時使用活動上下文。它與你的gridview圖像無關。 – Raghunandan 2013-04-20 07:18:21