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分享ImageView imageView = new ImageView(this);
我写的瀑布流显示图片
每次执行到Log.e("error","101成功压缩图片")这句就没办法执行了，下面是我的代码和
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package com.example.mywaterfallversion2;
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import android.app.Activity;
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import android.content.Context;
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import android.graphics.Bitmap;
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import android.graphics.BitmapFactory;
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import android.os.Bundle;
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import android.os.Handler;
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import android.os.Message;
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import android.util.Log;
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import android.view.MotionEvent;
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import android.view.View;
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import android.view.View.OnTouchListener;
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import android.widget.ImageView;
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import android.widget.LinearLayout;
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import android.widget.ScrollView;
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public class MainActivity extends Activity implements Runnable{
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Context context = this;
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private final int NUM_OF_PIC = 30; //每次请求获取的图片数量
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private LinearLayout linearLayout1 = null;
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private LinearLayout linearLayout2 = null;
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private LinearLayout linearLayout3 = null;
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private View scrollView = null;
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public static int USE_LINEAR_INTERVAL = 0;
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public static int linearlayoutWidth;
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private byte[][] picBytes = new byte[NUM_OF_PIC][];
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private int numOfPic = 0;//已加载的图片数量
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private int index = 0;
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public static int requestTime = 0;
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private PictureArrayOfBytes picArray ;
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private Handler mHandler = new Handler(){
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public void handleMessage(Message msg) {
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switch (msg.what) {
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case 1:
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try {
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Log.e("error","39");
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addBitmaps();
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Log.e("error","41");
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} catch (Exception e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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}
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break;
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}
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};
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};
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.main);
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linearLayout1 = (LinearLayout)findViewById(R.id.main_linearlayout1);
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linearLayout2 = (LinearLayout)findViewById(R.id.main_linearlayout2);
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linearLayout3 = (LinearLayout)findViewById(R.id.main_linearlayout3);
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linearlayoutWidth = (int)(getWindowManager().getDefaultDisplay().getWidth()/3);
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Log.e("error","creat: " + String.valueOf(linearlayoutWidth));
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scrollView = findViewById(R.id.scroll);
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Log.e("error","61");
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final Thread thread = new Thread(new MainActivity());
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Log.e("error","65");
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thread.start();
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Log.e("error","67");
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scrollView.setOnTouchListener(new OnTouchListener() {
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@Override
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public boolean onTouch(View v, MotionEvent event) {
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switch (event.getAction()) {
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case MotionEvent.ACTION_DOWN :
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break;
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case MotionEvent.ACTION_MOVE :
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index++;
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break;
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default :
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break;
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}
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if (event.getAction() == MotionEvent.ACTION_UP && index > 0) {
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index = 0;
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View view = ((ScrollView) v).getChildAt(0);
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if (view.getMeasuredHeight() <= v.getScrollY() + v.getHeight()) {
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//加载数据代码
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//每次加载30张图片，一共加载5次
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if (numOfPic >= NUM_OF_PIC){
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numOfPic = 0;
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thread.start();
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}
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}
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}
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return false;
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}
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});
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Log.e("error","90");
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}
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private void addBitmaps() throws Exception{
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Log.e("error","87:开始加载图片");
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for (int i = 0; i < NUM_OF_PIC; i++){
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Log.e("error","将图片数据转换成bitmap");
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Bitmap bitmap = BitmapFactory.decodeByteArray(picBytes[i], 0, picBytes[i].length);
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Log.e("error","改编图片的大小");
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Bitmap bitmap2 = BitmapZoom.bitmapZoomByWidth(bitmap, 240); //压缩图片大小
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Log.e("error","101成功压缩图片");
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ImageView imageView = new ImageView(context);
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Log.e("error","103");
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imageView.setImageBitmap(bitmap);
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Log.e("error","105");
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//根据图片的大小，为图片挖坑
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LinearLayout.LayoutParams layoutParams = newLinearLayout.LayoutParams(bitmap2.getWidth(), bitmap2.getHeight());
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//将坑和图片对象联系起来
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Log.e("error","109");
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imageView.setLayoutParams(layoutParams);
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Log.e("error","111");
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//按照顺序加载图片
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switch (USE_LINEAR_INTERVAL)
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{
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case 0:
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linearLayout1.addView(imageView);
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numOfPic++;
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break;
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case 1:
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linearLayout2.addView(imageView);
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numOfPic++;
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break;
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case 2:
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linearLayout3.addView(imageView);
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numOfPic++;
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break;
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default:
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break;
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}
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USE_LINEAR_INTERVAL++;
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USE_LINEAR_INTERVAL= USE_LINEAR_INTERVAL%3;
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}
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}
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@Override
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public void run() {
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// TODO Auto-generated method stub
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try {
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requestTime++;
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picArray = new PictureArrayOfBytes(requestTime);
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picBytes = picArray.getPicByteArray();
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Message message = new Message();
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message.what = 1;
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Log.e("error","153");
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mHandler.sendMessage(message);
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} catch (Exception e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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}
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}
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}
logcat截图：
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