我一直在寻找如何解决几个问题,并得到了一些问题的答案,但有一件事仍在建设中,如果你们都不能帮助我,就不会完成。 :/
我一直在尝试放大和缩小 GridView,但转向了其他解决方案,因为我只需要两种状态:概述和详细视图。因此我制作了两个 Gridview。第一个是两个网格视图内的图像都缩小并显示而不滚动。另一种是以原始尺寸显示图像的图像。您可以在其中水平和垂直滚动。
我的问题是这两个网格视图之间的切换。如果我单击其中之一,我尝试将两者“设置可见性”为“消失”或“可见”。
这是我的代码:
Starter:
package test.scroll;
import android.app.Activity;
import android.os.Bundle;
import android.widget.GridView;
import android.view.View;
import android.view.View.OnClickListener;
public class TestScrollActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final GridView grd_overview = (GridView)this.findViewById(R.id.grd_overview);
grd_overview.setAdapter(new OverviewImageAdapter(this));
final GridView grd_detailed = (GridView)this.findViewById(R.id.grd_detailed);
grd_detailed.setVisibility(2);
grd_detailed.setAdapter(new DetailedImageAdapter(this));
grd_overview.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
grd_overview.setVisibility(2);
grd_detailed.setVisibility(0);
}
});
grd_detailed.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
grd_detailed.setVisibility(2);
grd_overview.setVisibility(0);
}
});
}
}
概述适配器:
package test.scroll;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
public class OverviewImageAdapter extends BaseAdapter {
private Context mContext;
public OverviewImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return mThumbIds.length;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
// create a new ImageView for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(82, 82));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
} else {
imageView = (ImageView) convertView;
}
imageView.setImageResource(mThumbIds[position]);
return imageView;
}
// references to our images
private Integer[] mThumbIds = {
R.drawable.memory_1, R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1,
R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1,
R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1,
R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1,
R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1,
R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1,R.drawable.memory_1
};
}
详细适配器:
package test.scroll;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
public class DetailedImageAdapter extends BaseAdapter {
private Context mContext;
public DetailedImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return mThumbIds.length;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
// create a new ImageView for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(82, 82));
} else {
imageView = (ImageView) convertView;
}
imageView.setImageResource(mThumbIds[position]);
return imageView;
}
// references to our images
private Integer[] mThumbIds = {
R.drawable.memory_2, R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2,
R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2,
R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2,
R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2,
R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2,
R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2,R.drawable.memory_2
};
}
XML:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/app_layout"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<!-- PLAYGROUND -->
<test.scroll.TwoDScrollView
android:id="@+id/scene_scroller"
android:drawingCacheQuality="low"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<LinearLayout
android:id="@+id/grds"
android:drawingCacheQuality="low"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
<GridView
android:id="@+id/grd_overview"
android:drawingCacheQuality="low"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<GridView
android:id="@+id/grd_detailed"
android:drawingCacheQuality="low"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
</test.scroll.TwoDScrollView>
<!-- ATTRIBUTES -->
<Button
android:id="@+id/btn_cancel"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/scene_scroller"
android:text="cancel"
/>
</RelativeLayout>
您对如何在这两个网格视图之间切换有什么建议吗?让我知道 :)
Basti