GridView项目太小-Android
我正在关注,它非常简单,但是我的GridView图像比教程中的要小得多。是否有任何代码是错误的?下面我介绍了我的主要活动、适配器类以及我的GridView项目太小-Android,android,gridview,baseadapter,Android,Gridview,Baseadapter,我正在关注,它非常简单,但是我的GridView图像比教程中的要小得多。是否有任何代码是错误的?下面我介绍了我的主要活动、适配器类以及我的xml和GridView 应该是这样的: 相反,我的是这样的: SitesActivity.java package org.azurespot.cutelinks; import android.os.Bundle; import android.support.v7.app.ActionBarActivity; import android.view
xml
和GridView
应该是这样的:
相反,我的是这样的:
SitesActivity.java
package org.azurespot.cutelinks;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.GridView;
import org.azurespot.R;
public class SitesActivity extends ActionBarActivity {
private GridView gridView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sites);
// with fragments, make sure you include the rootView when finding id
gridView = (GridView) findViewById(R.id.sites_grid);
// Set the Adapter to GridView
gridView.setAdapter(new GridViewSitesAdapter(this));
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_sites, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
package org.azurespot.cutelinks;
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 org.azurespot.R;
/**
* Created by mizu on 2/11/15.
*/
public class GridViewSitesAdapter extends BaseAdapter {
public Context mContext;
public GridViewSitesAdapter(Context c) {
mContext = c;
}
// Keep all Images in array
public Integer[] mThumbIds = {
R.drawable.cute_overload, R.drawable.attack_of_the_cute,
R.drawable.zoo_borns, R.drawable.cutest_paw,
R.drawable.mochimochiland, R.drawable.baby_mugging,
R.drawable.cutest_food, R.drawable.tiny_cute_things,
R.drawable.etsy_robot_plush
};
@Override
public int getCount() {
return mThumbIds.length;
}
@Override
public Object getItem(int position) {
return mThumbIds[position];
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView = new ImageView(mContext);
imageView.setImageResource(mThumbIds[position]);
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setLayoutParams(new GridView.LayoutParams(70, 70));
return imageView;
}
}
GridViewSitesAdapter.java
package org.azurespot.cutelinks;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.GridView;
import org.azurespot.R;
public class SitesActivity extends ActionBarActivity {
private GridView gridView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sites);
// with fragments, make sure you include the rootView when finding id
gridView = (GridView) findViewById(R.id.sites_grid);
// Set the Adapter to GridView
gridView.setAdapter(new GridViewSitesAdapter(this));
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_sites, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
package org.azurespot.cutelinks;
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 org.azurespot.R;
/**
* Created by mizu on 2/11/15.
*/
public class GridViewSitesAdapter extends BaseAdapter {
public Context mContext;
public GridViewSitesAdapter(Context c) {
mContext = c;
}
// Keep all Images in array
public Integer[] mThumbIds = {
R.drawable.cute_overload, R.drawable.attack_of_the_cute,
R.drawable.zoo_borns, R.drawable.cutest_paw,
R.drawable.mochimochiland, R.drawable.baby_mugging,
R.drawable.cutest_food, R.drawable.tiny_cute_things,
R.drawable.etsy_robot_plush
};
@Override
public int getCount() {
return mThumbIds.length;
}
@Override
public Object getItem(int position) {
return mThumbIds[position];
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView = new ImageView(mContext);
imageView.setImageResource(mThumbIds[position]);
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setLayoutParams(new GridView.LayoutParams(70, 70));
return imageView;
}
}
activity\u sites.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="org.azurespot.cutelinks.SitesActivity"
android:background="#2198bb">
<GridView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/sites_grid"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:horizontalSpacing="10dp"
android:verticalSpacing="10dp"
android:layout_margin="10dp"
android:columnWidth="90dp"
android:gravity="center"
android:numColumns="auto_fit"
android:stretchMode="columnWidth"
android:background="@drawable/button_border">
</GridView>
</RelativeLayout>
为什么不根据屏幕宽度计算gridview项的宽度
columnWidth = (int) ((getScreenWidth() - ((AppConstant.NUM_OF_COLUMNS + 1) * padding)) / AppConstant.NUM_OF_COLUMNS);
希望此代码示例行将帮助您理解。如果你需要帮助,请告诉我
谢谢:)您的图像是否相对较小?尝试更改
imageView.setLayoutParams(新的GridView.LayoutParams(70,70))代码>到imageView.setLayoutParams(新的GridView.LayoutParams(LayoutParams.WRAP_内容,LayoutParams.WRAP_内容))代码>并查看它是否修复了任何问题。谢谢iRuth,我的图像比需要的还要大。虽然我尝试了该代码,但括号内的'LayoutParams'出现红色错误。知道为什么吗?事实上,多亏了iRuth,我试着增加了70个数字,而且它们越来越大了。谢谢你把我的注意力缩小到这一点!我不习惯以编程方式编写xml,因此这是一个很好的教训。谢谢Fahim!谢谢你发帖。我确实通过改变java类中的图像编号来解决这个问题。看起来我之前学习的教程以编程方式和xml
完成了一半又一半。我给你的解决方案适用于各种分辨率的手机和标签。仅仅更改列的数量是不起作用的