问题描述
我正在开发一个带有10个imageButtons的gridview的应用程序。现在我实现了一个名为SquareImageView的方法，以将列数调整为2，而与屏幕大小无关。我不知道如何将文本放入其中。
我目前的申请是这样的：
如您所见，网格中只有图像。我想给边框，中间每个图像中的一些文本。
我的文件是：
package com.defcomdevs.invento16;
import android.content.Context;
import android.content.Intent;
import android.content.res.Resources;
import android.os.Bundle;
import android.support.design.widget.CollapsingToolbarLayout;
import android.support.design.widget.CoordinatorLayout;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.NavigationView;
import android.support.design.widget.Snackbar;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v4.widget.NestedScrollView;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.GridView;
import android.widget.ImageButton;
import android.widget.Toast;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
private CollapsingToolbarLayout mcollapsingToolbar;
private NestedScrollView mnestedScrollView;
private CoordinatorLayout coordinatorLayout;
private DrawerLayout drawerLayout;
int backButtonCount = 0;
private Button button;
GridView mygrid;
private ImageButton imageButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
coordinatorLayout = (CoordinatorLayout) findViewById(R.id.coordinator);
coordinatorLayout.setBackground(getResources().getDrawable(R.drawable.oppo));
// drawerLayout.setBackground(getResources().getDrawable(R.drawable.oppo));
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
//button= (Button) findViewById(R.id.setalarm);
mcollapsingToolbar = (CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar);
//mnestedScrollView= (NestedScrollView) findViewById(R.id.rvToDoList);
mcollapsingToolbar.setTitle("INVENTO '16");
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
callRegister();
}
});
mygrid= (GridView) findViewById(R.id.gridView);
mygrid.setAdapter(new MizAdapter(this));
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
public void callRegister() {
Intent intent = new Intent(this, Registration.class);
startActivity(intent);
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
}
if (backButtonCount >= 1) {
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
} else {
Toast.makeText(this, "Press the back button once again to close the application.", Toast.LENGTH_SHORT).show();
backButtonCount++;
}
}
/* public void setalarm(View view){
if(view.getId()==R.id.setalarm){
Intent intent=new Intent(this,AlarmActivity.class);
startActivity(intent);
}
}*/
@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;
}
@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) {
Intent intent = new Intent(this, Settings.class);
startActivity(intent);
}
return super.onOptionsItemSelected(item);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.about_college) {
// Handle the camera action
} else if (id == R.id.cse) {
} else if (id == R.id.it) {
} else if (id == R.id.ece) {
} else if (id == R.id.mech) {
} else if (id == R.id.Coding) {
Intent intent = new Intent(this, Coding.class);
startActivity(intent);
} else if (id == R.id.Hacking) {
} else if (id == R.id.printing) {
} else if (id == R.id.Big) {
} else if (id == R.id.nand) {
} else if (id == R.id.cryo) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
class itemName{ //Since we have to bounr the image to the item with the name and the subtitle
//we keep all information inside the class and deal with the class entirely
String Iname;
int ImageId;
itemName(String name,int imageId){
Iname=name;
ImageId=imageId;
}
}
class MizAdapter extends BaseAdapter{
ArrayList<itemName> items;
Context context;
MizAdapter(Context context){
this.context=context;
items=new ArrayList<itemName>(); //initialize each item with the type itemName.
Resources res=context.getResources();
String[] itemnames=res.getStringArray(R.array.Items);
int[] itempics={R.drawable.hackbttn100,R.drawable.hackbttn100,R.drawable.hackbttn,R.drawable.hackbttn,R.drawable.hackbttn,R.drawable.hackbttn,R.drawable.hackbttn,R.drawable.hackbttn,R.drawable.hackbttn,R.drawable.hackbttn};
for(int i=0;i<10;i++){
itemName names=new itemName(itemnames[i],itempics[i]);
items.add(names);
}
}
@Override
public int getCount() {
return items.size();
}
@Override
public Object getItem(int position) {
return items.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
class ViewHolder{
ImageButton myImage;
ViewHolder(View v){
myImage= (ImageButton) v.findViewById(R.id.picture);
}
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row=convertView;
ViewHolder viewHolder=null;
if (row==null){
LayoutInflater inflater= (LayoutInflater) context.getSystemService(LAYOUT_INFLATER_SERVICE);
row=inflater.inflate(R.layout.singleitem, parent, false);
viewHolder=new ViewHolder(row);
row.setTag(viewHolder);
}
else {
viewHolder= (ViewHolder) row.getTag();
}
itemName temp=items.get(position);
viewHolder.myImage.setImageResource(temp.ImageId);
return row;
}
public void coding(View v){
}
}
}接下来是将列数设置为2，而不考虑屏幕大小。
package com.defcomdevs.invento16;
import android.content.Context;
import android.util.AttributeSet;
import android.widget.ImageButton;
/**
* Created by midhun on 23/10/15.
*/
public class SquareImageView extends ImageButton {
public SquareImageView(Context context) {
super(context);
}
public SquareImageView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public SquareImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
setMeasuredDimension(getMeasuredWidth(), getMeasuredWidth()); //Snap to width
}
}
我的mainactivity.xml文件
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:id="@+id/app_bar"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="196dp"
android:background="#3f51b5"
app:contentScrim="@color/colorPrimary"
app:expandedTitleMarginEnd="64dp"
app:expandedTitleMarginStart="48dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:id="@+id/imageview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:src="@drawable/index"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="@style/AppTheme.PopupOverlay" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v4.widget.NestedScrollView>
<GridView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="1dp"
android:layout_marginRight="1dp"
android:layout_marginTop="198dp"
android:id="@+id/gridView"
android:verticalSpacing="1dp"
android:horizontalSpacing="1dp"
android:numColumns="2"
android:stretchMode="columnWidth"/>
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right|bottom"
android:layout_margin="@dimen/fab_margin"
android:src="@android:drawable/ic_dialog_email" />
现在，每个ImageButton都有一个通用的布局xml文件
<?xml version="1.0" encoding="utf-8"?>
<com.defcomdevs.invento16.SquareImageView
android:id="@+id/picture"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:adjustViewBounds="true"
android:onClick="coding"
android:background="@drawable/custom_button"/>
同样在这里，我想为所有这些imagebutton定义一个自定义背景，以便当用户单击该按钮时，下面的图像上会出现一点透明的颜色（任何颜色）。 请帮帮我。
1楼
为什么不对网格视图布局使用单独的布局。 这样每个按钮实际上都是具有父布局的布局，即RelativeLayout和在布局内部，您有两个子视图。 一种是在底部具有重力参数的文本视图。 然后将图片作为父布局的背景。
使用此布局作为适配器布局。 它将为您想要的每个项目重新创建它。