我想做类似于EditContact活动的事情（添加各种数字以与简单的添加按钮联系）。
我的第一个方法是创建自动添加到活动布局的自定义布局（Activity with dynamicly added components freezes）用户Budius提到使用listview和自定义适配器来实现解决方案。所以我尝试了，但行为结束就像我的第一次尝试。
添加3-4个条目后，活动会冻结。 （在星系s3和模拟器上）
也许你有个主意？
logcat的：
11-01 15:42:33.214: D/dalvikvm(712): GC_CONCURRENT freed 148K, 3% free 8283K/8519K, paused 74ms+102ms, total 242ms
11-01 15:42:33.733: I/Choreographer(712): Skipped 93 frames! The application may be doing too much work on its main thread.
11-01 15:42:42.293: I/Choreographer(712): Skipped 49 frames! The application may be doing too much work on its main thread.
11-01 15:42:44.946: D/dalvikvm(712): GC_CONCURRENT freed 72K, 2% free 8672K/8839K, paused 16ms+36ms, total 224ms
11-01 15:42:45.593: I/Choreographer(712): Skipped 66 frames! The application may be doing too much work on its main thread.
11-01 15:42:48.913: I/Choreographer(712): Skipped 35 frames! The application may be doing too much work on its main thread.
11-01 15:42:49.093: I/Choreographer(712): Skipped 42 frames! The application may be doing too much work on its main thread.
11-01 15:42:55.083: I/Choreographer(712): Skipped 125 frames! The application may be doing too much work on its main thread.
11-01 15:42:55.343: I/Choreographer(712): Skipped 68 frames! The application may be doing too much work on its main thread.
11-01 15:42:55.653: I/Choreographer(712): Skipped 40 frames! The application may be doing too much work on its main thread.
11-01 15:43:02.553: D/dalvikvm(712): GC_CONCURRENT freed 318K, 5% free 8821K/9223K, paused 16ms+68ms, total 231ms
11-01 15:43:02.863: D/dalvikvm(712): GC_FOR_ALLOC freed 418K, 7% free 8800K/9415K, paused 73ms, total 76ms
11-01 15:43:02.883: I/Choreographer(712): Skipped 224 frames! The application may be doing too much work on its main thread.
11-01 15:43:03.013: D/dalvikvm(712): GC_CONCURRENT freed 397K, 7% free 8804K/9415K, paused 74ms+6ms, total 113ms
11-01 15:43:03.013: D/dalvikvm(712): WAIT_FOR_CONCURRENT_GC blocked 33ms
11-01 15:43:03.063: D/dalvikvm(712): GC_FOR_ALLOC freed 386K, 7% free 8802K/9415K, paused 41ms, total 41ms
11-01 15:43:03.183: D/dalvikvm(712): GC_CONCURRENT freed 388K, 7% free 8806K/9415K, paused 75ms+7ms, total 119ms
11-01 15:43:03.183: D/dalvikvm(712): WAIT_FOR_CONCURRENT_GC blocked 35ms
11-01 15:43:03.243: D/dalvikvm(712): GC_FOR_ALLOC freed 378K, 7% free 8803K/9415K, paused 51ms, total 51ms
11-01 15:43:03.433: I/Choreographer(712): Skipped 142 frames! The application may be doing too much work on its main thread.
comment:..... adding the 4. row to custom adapter and listview .....
11-01 15:36:31.662: I/Choreographer(712): Skipped 36 frames! The application may be doing too much work on its main thread.
11-01 15:36:32.542: D/dalvikvm(712): GC_CONCURRENT freed 415K, 23% free 9057K/11719K, paused 18ms+15ms, total 139ms
11-01 15:36:32.554: D/dalvikvm(712): WAIT_FOR_CONCURRENT_GC blocked 123ms
11-01 15:36:32.613: D/dalvikvm(712): GC_FOR_ALLOC freed 492K, 23% free 9046K/11719K, paused 56ms, total 56ms
11-01 15:36:32.753: D/dalvikvm(712): GC_CONCURRENT freed 449K, 23% free 9078K/11719K, paused 76ms+7ms, total 134ms
11-01 15:36:32.753: D/dalvikvm(712): WAIT_FOR_CONCURRENT_GC blocked 48ms
11-01 15:36:32.813: D/dalvikvm(712): GC_FOR_ALLOC freed 514K, 23% free 9046K/11719K, paused 54ms, total 54ms
11-01 15:36:32.943: D/dalvikvm(712): GC_CONCURRENT freed 451K, 23% free 9078K/11719K, paused 76ms+8ms, total 128ms
11-01 15:36:32.943: D/dalvikvm(712): WAIT_FOR_CONCURRENT_GC blocked 44ms
11-01 15:36:33.013: D/dalvikvm(712): GC_FOR_ALLOC freed 516K, 23% free 9046K/11719K, paused 53ms, total 53ms
11-01 15:36:33.143: D/dalvikvm(712): GC_CONCURRENT freed 453K, 23% free 9078K/11719K, paused 75ms+9ms, total 127ms
11-01 15:36:33.143: D/dalvikvm(712): WAIT_FOR_CONCURRENT_GC blocked 41ms
11-01 15:36:33.193: D/dalvikvm(712): GC_FOR_ALLOC freed 518K, 23% free 9046K/11719K, paused 50ms, total 50ms
11-01 15:36:33.333: D/dalvikvm(712): GC_CONCURRENT freed 454K, 23% free 9078K/11719K, paused 75ms+8ms, total 137ms
11-01 15:36:33.333: D/dalvikvm(712): WAIT_FOR_CONCURRENT_GC blocked 59ms
11-01 15:36:33.393: D/dalvikvm(712): GC_FOR_ALLOC freed 520K, 23% free 9046K/11719K, paused 56ms, total 56ms
11-01 15:36:33.533: D/dalvikvm(712): GC_CONCURRENT freed 456K, 23% free 9079K/11719K, paused 75ms+8ms, total 129ms
11-01 15:36:33.533: D/dalvikvm(712): WAIT_FOR_CONCURRENT_GC blocked 52ms
comment:..... many of this .....
11-01 15:40:05.064: D/dalvikvm(712): GC_FOR_ALLOC freed 451K, 23% free 9135K/11719K, paused 97ms, total 97ms
11-01 15:40:05.204: D/dalvikvm(712): GC_CONCURRENT freed 451K, 23% free 9135K/11719K, paused 76ms+6ms, total 136ms
11-01 15:40:05.204: D/dalvikvm(712): WAIT_FOR_CONCURRENT_GC blocked 47ms
11-01 15:40:05.293: D/dalvikvm(712): GC_FOR_ALLOC freed 451K, 23% free 9135K/11719K, paused 66ms, total 66ms
11-01 15:40:05.443: D/dalvikvm(712): GC_CONCURRENT freed 451K, 23% free 9135K/11719K, paused 76ms+6ms, total 148ms
11-01 15:40:05.443: D/dalvikvm(712): WAIT_FOR_CONCURRENT_GC blocked 67ms
11-01 15:40:05.513: D/dalvikvm(712): GC_FOR_ALLOC freed 451K, 23% free 9135K/11719K, paused 59ms, total 59ms
11-01 15:40:05.643: D/dalvikvm(712): GC_CONCURRENT freed 451K, 23% free 9135K/11719K, paused 76ms+7ms, total 127ms
11-01 15:40:05.643: D/dalvikvm(712): WAIT_FOR_CONCURRENT_GC blocked 41ms
11-01 15:40:05.703: D/dalvikvm(712): GC_FOR_ALLOC freed 451K, 23% free 9135K/11719K, paused 56ms, total 56ms
11-01 15:40:05.833: D/dalvikvm(712): GC_CONCURRENT freed 451K, 23% free 9135K/11719K, paused 75ms+7ms, total 127ms
11-01 15:40:05.833: D/dalvikvm(712): WAIT_FOR_CONCURRENT_GC blocked 42ms
11-01 15:40:05.913: D/dalvikvm(712): GC_FOR_ALLOC freed 451K, 23% free 9135K/11719K, paused 63ms, total 63ms
11-01 15:40:06.114: D/dalvikvm(712): GC_CONCURRENT freed 451K, 23% free 9135K/11719K, paused 76ms+39ms, total 196ms
11-01 15:40:06.114: D/dalvikvm(712): WAIT_FOR_CONCURRENT_GC blocked 118ms
11-01 15:40:06.963: E/Trace(734): error opening trace file: No such file or directory (2)
11-01 15:40:07.953: D/gralloc_goldfish(734): Emulator without GPU emulation detected.
这是我的活动：
package com.float.rezepte;
import java.io.File;
import java.util.ArrayList;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.RatingBar;
import android.widget.TextView;
import android.widget.Toast;
import com.actionbarsherlock.app.SherlockActivity;
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuItem;
import com.float.utilities.ImageProcessing;
import com.float.utilities.Utilities;
public class AddRecipeActivity extends SherlockActivity {
private EditText editTextName;
private EditText editTextDescription;
private EditText editTextDuration;
private EditText editTextPortions;
private EditText editTextPortionsUnit;
private RatingBar ratingBarDifficutly;
private ImageView imageViewPicture;
private static final int SELECT_PICTURE = 1;
private static final int TAKE_PICTURE = 2;
public boolean deletePicture = false;
private String selectedImagePath;
private byte[] recipePicture = null;
private Recipe recipe;
private ProgressDialog dialog;
private IngredientAdapter ingredientAdapter;
private ImageButton imageButtonAddIngredient;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_recipe);
ConnectView();
ArrayList<Ingredient> values;
if (savedInstanceState != null)
{
recipe = savedInstanceState.getParcelable("recipe");
editTextName.setText(recipe.getName());
editTextDescription.setText(recipe.getDescription());
editTextDuration.setText(String.valueOf(recipe.getDuration()));
editTextPortions.setText(String.valueOf(recipe.getPortions()));
editTextPortionsUnit.setText(recipe.getPortionsUnit());
ratingBarDifficutly.setRating(recipe.getDifficulty());
values = (ArrayList<Ingredient>) recipe.getIngredientList();
}else{
recipe = new Recipe();
values = new ArrayList<Ingredient>();
}
ingredientAdapter = new IngredientAdapter(this, values);
final ListView listViewIngredients = (ListView) findViewById(R.id.listViewIngredients);
listViewIngredients.setAdapter(ingredientAdapter);
imageButtonAddIngredient.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
ingredientAdapter.addItem(new Ingredient());
ingredientAdapter.notifyDataSetChanged();
Utilities.setListViewHeightBasedOnChildren(listViewIngredients);
}
});
final ViewTreeObserver observer = imageViewPicture.getViewTreeObserver();
observer.addOnGlobalLayoutListener (new OnGlobalLayoutListener () {
@Override
public void onGlobalLayout() {
imageViewPicture.getViewTreeObserver().addOnGlobalLayoutListener(this);
if(recipe.getPicture() != null){
imageViewPicture.setImageBitmap(ImageProcessing.scaleImage(recipe.getPicture(), imageViewPicture.getWidth(), imageViewPicture.getHeight()));
}
}
});
}
private void ConnectView(){
editTextName = (EditText) findViewById(R.id.editTextName);
editTextDescription = (EditText) findViewById(R.id.editTextDescription);
editTextDuration = (EditText) findViewById(R.id.editTextDuration);
editTextPortions = (EditText) findViewById(R.id.editTextPortions);
editTextPortionsUnit = (EditText) findViewById(R.id.editTextPortionsUnit);
ratingBarDifficutly = (RatingBar) findViewById(R.id.ratingBarDifficulty);
imageViewPicture = (ImageView) findViewById(R.id.imageViewPicture);
imageButtonAddIngredient = (ImageButton) findViewById(R.id.imageButtonAddIngredient);
}
@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
super.onSaveInstanceState(savedInstanceState);
savedInstanceState.putParcelable("recipe", copyUserInputToRecipe());
}
private Recipe copyUserInputToRecipe(){
recipe.setName(editTextName.getText().toString());
recipe.setDescription(editTextDescription.getText().toString());
recipe.setDifficulty(ratingBarDifficutly.getRating());
if(!editTextDuration.getText().toString().equals("")){
recipe.setDuration(Integer.parseInt(editTextDuration.getText().toString()));
}
if(!editTextPortions.getText().toString().equals("")){
recipe.setPortions(Integer.parseInt(editTextPortions.getText().toString()));
}
recipe.setPortionsUnit(editTextPortionsUnit.getText().toString());
if(recipePicture != null){
recipe.setPicture(recipePicture);
}
return recipe;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getSupportMenuInflater().inflate(R.menu.activity_add_recipe, menu);
return true;
}
@Override
public void onBackPressed() {
super.onBackPressed();
overridePendingTransition(android.R.anim.fade_in,
android.R.anim.fade_out);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_cancel_recipe:
finish();
break;
case R.id.menu_save_recipe:
Intent returnIntent = new Intent();
returnIntent.putExtra("recipe", recipe);
setResult(RESULT_OK, returnIntent);
finish();
break;
}
return super.onOptionsItemSelected(item);
}
}
编辑： ViewTreeObserver是问题所在。移除后，没有冻结。
答案 0 :(得分：1)
两件事：
你的适配器中addItem方法的实现不是线程保存。使它同步。您还在getView方法中调用了data.remove（...） - 再次以线程不安全的方式完成。
更改相应文本时，可以修改Ingredient对象。在您的Ingredient类的实现中，您是否还更改了相关EditText组件的内容？如果是这样，那么每次调用editText.setText（...）时，都会调用TextWatcher进入无限循环。 SGS 3是一款四核CPU设备，因此它可以实时处理多达4个线程（一个用于永久性用户界面，因此留下另外3个线程）。
解决这些问题，看看你是否能抓住情况的尾巴。操作沉重对于SGS 3来说应该不是什么大问题 - 它有足够的应对能力。
希望这有帮助。
答案 1 :(得分：0)
如果我不得不猜测，似乎你的适配器方法中有文本观察者类，更重要的是getView()中的文本监听器。所以，我假设它正在为每一行创建类，并且一直在同时收听每个行。根据您拥有的行数，如果文本观察者固有的话，可能会占用大量资源。您应该找到一种以不同方式实现它的方法。也许在你的适配器外面做一个设置（为了安全），或者做一些构造函数，或者让适配器以某种方式实现它。或者我要做什么 - 只听取所选行中的视图。并在未选中时关闭。值得一试。
编辑：有很多方法。但我认为BaseAdapter最简单的方法是在你想听的每一件事上设置position的标签然后onFocusChanged我想（如果OnClick给出了问题） ，如果标签与位置匹配，请执行您的操作。但如果没有这一点，如果表现良好，那么这一切可能都是不必要就我们所知，侦听器方法已经很好地优化了。只是我当时想不出另一种解释。
答案 2 :(得分：0)
因此，您可以将图像字节存储在设备方向更改时重复使用...
您可以通过覆盖
来检测设备方向更改 onConfigurationChanged(Configuration newConfig)
和
http://developer.android.com/reference/android/content/res/Configuration.html
确保指定
android:configChanges="orientation"
在该活动的清单条目中。通过此功能，您可以检测设备是纵向还是横向。最重要的是，这只会在设备方向改变时触发（与全局布局监听器不同，后者会随着屏幕上的每一个微小变化而激活）。
希望这会有所帮助。
答案 3 :(得分：0)
如果您在主ui中进行更新或通过线程执行更新或在主ui线程上授予网络策略权限，则会发生这些事情。
执行此操作的唯一方法是使用AsyncTask。通过这个以及在asynctask set adapter view等结束时获取您的数据。