本文介绍了不能从另一个活动调用Gridview活动的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
这是我以前的问题的更新
This is an update from my previous questions How to call the Gridview Activity from another activity which I added my codes
这是我的gallery.xml
Here is my gallery.xml
<?xml version="1.0" encoding="utf-8"?>
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/gridview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:columnWidth="90dp"
android:numColumns="auto_fit"
android:verticalSpacing="10dp"
android:horizontalSpacing="10dp"
android:stretchMode="columnWidth"
android:gravity="center"
/>
Gallery.java
Gallery.java
package com.example.diaz.chmscadvertisement;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.GridView;
public class Gallery extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.gallery);
GridView gridview = (GridView) findViewById(R.id.gridview);
gridview.setAdapter(new ImageAdapter(this));
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
}
ImageAdapter.java
ImageAdapter.java
package com.example.diaz.chmscadvertisement;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
/**
* Created by diaz on 10/10/2015.
*/
public class ImageAdapter extends BaseAdapter {
private Context mContext;
public ImageAdapter(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(85, 85));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8, 8, 8, 8);
} else {
imageView = (ImageView) convertView;
}
imageView.setImageResource(mThumbIds[position]);
return imageView;
}
// references to our images
private Integer[] mThumbIds = {
R.drawable.sample2, R.drawable.sample3,
R.drawable.sample4, R.drawable.sample5,
R.drawable.sample6, R.drawable.sample7,
R.drawable.sample10, R.drawable.sample1,
R.drawable.sample8, R.drawable.sample9,
};
}
Manifest.xml
Manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.diaz.chmscadvertisement" >
<application
android:allowBackup="true"
android:icon="@drawable/logoalijis"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity android:name=".ViewFlipperBody" />
<activity android:name=".AboutChmsc" />
<activity android:name=".CampusLife" />
<activity android:name=".AboutUs" />
<activity android:name=".MainMenu"></activity>
<activity android:name=".Gallery"/>
<activity
android:name=".SplashScreen"
android:label="CHMSC-Alijis" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
我的主菜单是我按下按钮以打开Gridview的地方
My Main Menu this is where I press the button in order to open the Gridview
MainMenu.java
MainMenu.java
package com.example.diaz.chmscadvertisement;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
public class MainMenu extends Activity implements View.OnClickListener {
Button button2;
Button button3;
Button button4;
Button button6;
Button button7;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mainmenu);
button2 = (Button) findViewById(R.id.button2);
button3 = (Button) findViewById(R.id.button3);
button4 = (Button) findViewById(R.id.button4);
button6 = (Button) findViewById(R.id.button6);
button7 = (Button) findViewById(R.id.button7);
button2.setOnClickListener(this);
button3.setOnClickListener(this);
button4.setOnClickListener(this);
button6.setOnClickListener(this);
button7.setOnClickListener(this);
}
public void onClick(View v){
if (v.getId() == R.id.button2) {
Intent intent = new Intent(this, ViewFlipperBody.class);
this.startActivity(intent);
} else if (v.getId() == R.id.button3) {
Intent intent = new Intent(this, AboutChmsc.class);
this.startActivity(intent);
} else if (v.getId() == R.id.button4) {
Intent intent = new Intent(this, CampusLife.class);
this.startActivity(intent);
}
else if (v.getId() == R.id.button6) {
Intent intent = new Intent(this, Gallery.class);
this.startActivity(intent);
}
else if (v.getId() == R.id.button7) {
Intent intent = new Intent(this, AboutUs.class);
this.startActivity(intent);
}
}
}
问题是当我单击Gallery按钮(MainMenu.java中的button6)时，gallery.xml根本没有打开.如果我将mThumbIds的元素替换为R.drawable.icon_launcher，它将正常工作.预先感谢
The problem is that when I click the Gallery button(which is the button6 in my MainMenu.java) the gallery.xml is not opening at all. If I replace mThumbIds's element with R.drawable.icon_launcher,it will work properly.Any idea? Thanks in advance
推荐答案
您应该添加一个布局以将GridView包装在gallery.xml中，否则其宽度和高度将为0dp.
You should add a layout to wrap GridView in gallery.xml,otherwise its width and height will be 0dp.
这篇关于不能从另一个活动调用Gridview活动的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！