Question

所以我试图创建一个应用程序，当您单击按钮时，它会显示很多图像。问题是当我单击按钮时，应用程序崩溃。这是我的XML文件的一部分。它有36个不同的图像：

<ImageView
    android:id="@+id/imageView31"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:src="@drawable/veh1" />

    <ImageView
    android:id="@+id/imageView32"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:src="@drawable/veh2" />

    <ImageView
    android:id="@+id/imageView33"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:src="@drawable/veh3" />

...

这是LogCat：

02-18 22:47:00.263: E/AndroidRuntime(366): FATAL EXCEPTION: main
02-18 22:47:00.263: E/AndroidRuntime(366): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.guzi.samphelptools/com.guzi.samphelptools.Vehicles}: android.view.InflateException: Binary XML file line #81: Error inflating class <unknown>
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.app.ActivityThread.access$1500(ActivityThread.java:117)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.os.Handler.dispatchMessage(Handler.java:99)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.os.Looper.loop(Looper.java:130)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.app.ActivityThread.main(ActivityThread.java:3683)
02-18 22:47:00.263: E/AndroidRuntime(366):  at java.lang.reflect.Method.invokeNative(Native Method)
02-18 22:47:00.263: E/AndroidRuntime(366):  at java.lang.reflect.Method.invoke(Method.java:507)
02-18 22:47:00.263: E/AndroidRuntime(366):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
02-18 22:47:00.263: E/AndroidRuntime(366):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
02-18 22:47:00.263: E/AndroidRuntime(366):  at dalvik.system.NativeStart.main(Native Method)
02-18 22:47:00.263: E/AndroidRuntime(366): Caused by: android.view.InflateException: Binary XML file line #81: Error inflating class <unknown>
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.view.LayoutInflater.createView(LayoutInflater.java:518)
02-18 22:47:00.263: E/AndroidRuntime(366):  at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:568)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.view.LayoutInflater.rInflate(LayoutInflater.java:623)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.view.LayoutInflater.rInflate(LayoutInflater.java:626)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.view.LayoutInflater.rInflate(LayoutInflater.java:626)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.view.LayoutInflater.inflate(LayoutInflater.java:408)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
02-18 22:47:00.263: E/AndroidRuntime(366):  at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:207)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.app.Activity.setContentView(Activity.java:1657)
02-18 22:47:00.263: E/AndroidRuntime(366):  at com.guzi.samphelptools.Vehicles.onCreate(Vehicles.java:14)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
02-18 22:47:00.263: E/AndroidRuntime(366):  ... 11 more
02-18 22:47:00.263: E/AndroidRuntime(366): Caused by: java.lang.reflect.InvocationTargetException
02-18 22:47:00.263: E/AndroidRuntime(366):  at java.lang.reflect.Constructor.constructNative(Native Method)
02-18 22:47:00.263: E/AndroidRuntime(366):  at java.lang.reflect.Constructor.newInstance(Constructor.java:415)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.view.LayoutInflater.createView(LayoutInflater.java:505)
02-18 22:47:00.263: E/AndroidRuntime(366):  ... 24 more
02-18 22:47:00.263: E/AndroidRuntime(366): Caused by: java.lang.OutOfMemoryError: bitmap size exceeds VM budget
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:460)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:336)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:697)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.content.res.Res`enter code here`ources.loadDrawable(Resources.java:1709)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.content.res.TypedArray.getDrawable(TypedArray.java:601)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.widget.ImageView.<init>(ImageView.java:118)
02-18 22:47:00.263: E/AndroidRuntime(366):  at android.widget.ImageView.<init>(ImageView.java:108)
02-18 22:47:00.263: E/AndroidRuntime(366):  ... 27 more

好的，所以我发现了这个简单的listview，但我无法让它运行。

        import android.os.Bundle;
import android.app.Activity;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import android.widget.ListView;
import android.widget.SimpleAdapter;

public class MainActivity extends Activity {

    // Array of integers points to images stored in /res/drawable-hdpi/
    int[] vehs = new int[]{
        R.drawable.veh1,         
        R.drawable.veh2,   
        R.drawable.veh3,
        R.drawable.veh4,
        R.drawable.veh5,
        R.drawable.veh6,
        R.drawable.veh7,
        R.drawable.veh8,
        R.drawable.veh9,
        R.drawable.veh10,
        R.drawable.veh11,         
        R.drawable.veh12,   
        R.drawable.veh13,
        R.drawable.veh14,
        R.drawable.veh15,
        R.drawable.veh16,
        R.drawable.veh17,
        R.drawable.veh18,
        R.drawable.veh19,
        R.drawable.veh20,
        R.drawable.veh21,         
        R.drawable.veh22,   
        R.drawable.veh23,
        R.drawable.veh24,
        R.drawable.veh25,
        R.drawable.veh26,
        R.drawable.veh27,
        R.drawable.veh28,
        R.drawable.veh29,
        R.drawable.veh30,
        R.drawable.veh31,
        R.drawable.veh32,
        R.drawable.veh33,
        R.drawable.veh34,
        R.drawable.veh35,
        R.drawable.veh36,
    };

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Each row in the list stores country name, currency and flag
        List<HashMap<String,String>> aList = new ArrayList<HashMap<String,String>>();

        for(int i=0;i<10;i++){
            HashMap<String, String> hm = new HashMap<String,String>();
            hm.put("", Integer.toString(vehs[i]) );
            aList.add(hm);
        }

        // Keys used in Hashmap
        String[] from = { "flag","txt","cur" };

        // Ids of views in listview_layout
        int[] to = { R.id.vehs};

        // Instantiating an adapter to store each items
        // R.layout.listview_layout defines the layout of each item
        SimpleAdapter adapter = new SimpleAdapter(getBaseContext(), aList, R.layout.listview_layout, from, to);

        // Getting a reference to listview of main.xml layout file
        ListView listView = ( ListView ) findViewById(R.id.listview);

        // Setting the adapter to the listView
        listView.setAdapter(adapter);
    }
}

如果你能帮助我，那就太好了！：d

Answer 1

你在这里遇到的问题是你在同时装载所有东西，我想。您应该尝试使用ListView并为每一行充气！这样做的方式是你的应用程序将一次加载一个或一个ImageView，其余的将留在侧面，直到用户滚动到它。

我找到的教程是（看＃71到约＃87 - 你可以在slidenerd.com上看到他所有的视频）：
http://www.youtube.com/watch?v=uic3TVp_j3M#t=0

您还应该调整位图的大小，以便它们不会以完整分辨率加载。例如，对于540 * 420屏幕，您不需要1920x1080图像。以下链接向您展示如何处理此问题。 http://developer.android.com/training/displaying-bitmaps/index.html

所以，最后，你将只有1个ListView，1个ImageView以及更少的代码和更少的混淆：P

编辑：快速指南：我将引导您完成ListView方法，因为我认为谷歌缩小图片示例很容易理解。

首先，您将拥有以下内容：

myActivity.xml（您需要这些图片的主要活动）
单行（单行的布局）
MyActivity.java（您的活动的java类）

myActivity.xml将包含ListView：

<ListView
    android:id="@+id/lvList"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true" >
</ListView>

singleRow.xml只包含一个ImageView - 你将使用相同的ImageView的LayoutParamaters并镜像它们36次：

<ImageView
    android:id="@+id/ivImage"
    android:layout_width="50dp"
    android:layout_height="85dp"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:src="@drawable/ic_launcher" />

MyActivity.java - 所有魔法发生的地方！

public class MyActivity extends Activity implements OnItemClickListener {
    ListView lv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        lv = (ListView) findViewById(R.id.lvList);
        MyAdapter adapter = new MyAdapter(this);
        lv.setAdapter(adapter);
        lv.setOnItemClickListener(this);
    }

    @Override
    public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
        MyView holder = (MyView) view.getTag(); // This will get the tag of the item click - that is set up below
    }

    //Create a holder for the image that will be in an ImageView
    class SingleRowData {
        int img;

        SingleRowData(int img) {
            this.img = img;
        }
    }

    //A reference to the ImageView that needs to be copied
    private class MyView {
        ImageView ivImg;

        MyView(View v) {
            ivImg = (ImageView) v.findViewById(R.id.ivHomePageRow);
        }
    }

    class MyAdapter extends BaseAdapter{
        ArrayList<SingleHPSRow> list;
        Context context;

        public MyAdapter(Context context) {
            this.context = context;
            list = new ArrayList<SingleRowData>();
            ...
            int[] imgId = ...; // let's say you are getting all the images from your resources .. you will have to set this up, I'm guessing you know how to.
            for(int item = 0; item < imgUrl.length; i++) {
                list.add(imgId[item]);
            }
        }

        @Override
        public int getCount() {
            return list.size();
        }

        @Override
        public Object getItem(int position) {
            return list.get(position);
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            view row = convertView; //This will try to see if the row has already been loaded b4
            MyView holder = null; initialize our custome View for the row
            if(row == null) { // new row
                LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); //Get the LayoutInflater
                row = inflater.inflate(R.layout.singleRow, parent, false); //Reference to the row layout
                holder = new MyView(row);
                row.setTag(holder); // Give the row a tag - the holder that contains the item
            } else { // old row
                holder = (MyView) row.getTag(); //Get the tag that was assigned
            }
            SingleRowData item = list.get(position); //Get the item at the current position
            int image = item.img; //Get the imgId assigned to the current item
            holder.ivImg.setImageResource(image); //Load image for the current position
            return row; // Return the current row
        }
    }
}

Hopefull这个很好解释，我复制并缩短了我的一个代码。如果您有不明白的事情，请告诉我

图像加载时应用程序崩溃

1 个答案: