Java 无法启动活动Componentinfo(适配器构造函数)
我试图创建一个简单的列表视图。我已经做过很多次了&这是我第一次面对这样的错误。在EclipseLuna和indigo中都尝试过这一点。两者都有相同的错误 这里是我创建适配器的一个瞬间的地方:Java 无法启动活动Componentinfo(适配器构造函数),java,android,eclipse,Java,Android,Eclipse,我试图创建一个简单的列表视图。我已经做过很多次了&这是我第一次面对这样的错误。在EclipseLuna和indigo中都尝试过这一点。两者都有相同的错误 这里是我创建适配器的一个瞬间的地方: import java.util.ArrayList; import android.app.Activity; import android.os.Bundle; import android.widget.ListView; public class ActivityMain extends Act
import java.util.ArrayList;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;
public class ActivityMain extends Activity {
public ArrayList<StructRemedy> remedies = new ArrayList<StructRemedy>();
private ListView lstContent;
public AdapterRemedy adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lstContent = (ListView) findViewById(R.id.lstContent);
adapter = new AdapterRemedy(remedies);
randomPopulation();
lstContent.setAdapter(adapter);
}
private void randomPopulation() {
for (int i = 0; i < 30; i++) {
StructRemedy remedy = new StructRemedy();
remedy.title = "Remedy" + i;
remedy.description = "Desc" + i;
remedy.rateValue = (float) (Math.random() * 5);
remedy.type = "tisane";
remedy.use = "Headaches";
remedies.add(remedy);
}
adapter.notifyDataSetChanged();
}
}
import java.util.ArrayList;
import android.content.Intent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.RatingBar;
import android.widget.TextView;
public class AdapterRemedy extends ArrayAdapter<StructRemedy> {
public AdapterRemedy(ArrayList<StructRemedy> remedies) {
super(G.context, R.layout.adapter_notes, remedies);
}
private static class ViewHolder {
public TextView txtTitle;
public TextView txtType;
public TextView txtFor;
public RatingBar rating;
public ViewGroup layoutRoot;
public ImageView imgLogo;
public ViewHolder(View view) {
layoutRoot = (ViewGroup) view.findViewById(R.id.layoutRoot);
txtTitle = (TextView) view.findViewById(R.id.txtTitle);
txtType = (TextView) view.findViewById(R.id.txtType);
txtFor = (TextView) view.findViewById(R.id.txtFor);
rating = (RatingBar) view.findViewById(R.id.rate);
imgLogo = (ImageView) view.findViewById(R.id.imgLogo);
}
public void fill(final ArrayAdapter<StructRemedy> adapter, final StructRemedy item, final int position) {
txtTitle.setText(item.title);
txtType.setText(item.type);
txtFor.setText(item.use);
rating.setRating(item.rateValue);
//imgLogo.setImageBitmap(bm);
layoutRoot.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(G.currentActivity, ActivitySelect.class);
intent.putExtra("POSITION", position);
G.currentActivity.startActivity(intent);
}
});
}
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
StructRemedy item = getItem(position);
if (convertView == null) {
convertView = G.inflater.inflate(R.layout.adapter_notes, parent, false);
holder = new ViewHolder(convertView);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.fill(this, item, position);
return convertView;
}
}
import java.util.ArrayList;
导入android.app.Activity;
导入android.os.Bundle;
导入android.widget.ListView;
公共类活动Main扩展活动{
公共ArrayList补救措施=新建ArrayList();
私有列表视图内容;
公共适配器远程适配器;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lstContent=(ListView)findViewById(R.id.lstContent);
适配器=新适配器remedy(补救措施);
随机总体();
lstContent.setAdapter(适配器);
}
私人人口(){
对于(int i=0;i<30;i++){
StructRemedy=新StructRemedy();
补救措施。title=“补救措施”+i;
rememy.description=“Desc”+i;
rememy.rateValue=(float)(Math.random()*5);
rememy.type=“tisane”;
补救措施。使用=“头痛”;
补救措施。添加(补救措施);
}
adapter.notifyDataSetChanged();
}
}
现在是错误日志(错误指我创建构造函数的那一行,你知道“super”行):
06-08 10:03:27.875:E/AndroidRuntime(2715):致命异常:主
06-08 10:03:27.875:E/AndroidRuntime(2715):java.lang.RuntimeException:无法启动活动组件信息{ahmad.azimi.app.ball_recipes/test.test1.app.ball_recipes.ActivityMain}:java.lang.NullPointerException
06-08 10:03:27.875:E/AndroidRuntime(2715):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
06-08 10:03:27.875:E/AndroidRuntime(2715):在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
06-08 10:03:27.875:E/AndroidRuntime(2715):在android.app.ActivityThread.access$600(ActivityThread.java:141)
06-08 10:03:27.875:E/AndroidRuntime(2715):在android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
06-08 10:03:27.875:E/AndroidRuntime(2715):在android.os.Handler.dispatchMessage(Handler.java:99)上
06-08 10:03:27.875:E/AndroidRuntime(2715):在android.os.Looper.loop(Looper.java:137)
06-08 10:03:27.875:E/AndroidRuntime(2715):位于android.app.ActivityThread.main(ActivityThread.java:5041)
06-08 10:03:27.875:E/AndroidRuntime(2715):位于java.lang.reflect.Method.Invokenactive(本机方法)
06-08 10:03:27.875:E/AndroidRuntime(2715):在java.lang.reflect.Method.invoke(Method.java:511)
06-08 10:03:27.875:E/AndroidRuntime(2715):在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
06-08 10:03:27.875:E/AndroidRuntime(2715):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
06-08 10:03:27.875:E/AndroidRuntime(2715):在dalvik.system.NativeStart.main(本机方法)
06-08 10:03:27.875:E/AndroidRuntime(2715):由以下原因引起:java.lang.NullPointerException
06-08 10:03:27.875:E/AndroidRuntime(2715):位于android.widget.ArrayAdapter.init(ArrayAdapter.java:310)
06-08 10:03:27.875:E/AndroidRuntime(2715):在android.widget.ArrayAdapter.(ArrayAdapter.java:153)
06-08 10:03:27.875:E/AndroidRuntime(2715):at test.test1.app.草药疗法.adaptermedy.(adaptermedy.java:22)
06-08 10:03:27.875:E/AndroidRuntime(2715):at test.test1.app.becable_recipes.ActivityMain.onCreate(ActivityMain.java:22)
06-08 10:03:27.875:E/AndroidRuntime(2715):在android.app.Activity.performCreate(Activity.java:5104)上
06-08 10:03:27.875:E/AndroidRuntime(2715):在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)上
06-08 10:03:27.875:E/AndroidRuntime(2715):在
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
这是适配器:
import java.util.ArrayList;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;
public class ActivityMain extends Activity {
public ArrayList<StructRemedy> remedies = new ArrayList<StructRemedy>();
private ListView lstContent;
public AdapterRemedy adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lstContent = (ListView) findViewById(R.id.lstContent);
adapter = new AdapterRemedy(remedies);
randomPopulation();
lstContent.setAdapter(adapter);
}
private void randomPopulation() {
for (int i = 0; i < 30; i++) {
StructRemedy remedy = new StructRemedy();
remedy.title = "Remedy" + i;
remedy.description = "Desc" + i;
remedy.rateValue = (float) (Math.random() * 5);
remedy.type = "tisane";
remedy.use = "Headaches";
remedies.add(remedy);
}
adapter.notifyDataSetChanged();
}
}
import java.util.ArrayList;
import android.content.Intent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.RatingBar;
import android.widget.TextView;
public class AdapterRemedy extends ArrayAdapter<StructRemedy> {
public AdapterRemedy(ArrayList<StructRemedy> remedies) {
super(G.context, R.layout.adapter_notes, remedies);
}
private static class ViewHolder {
public TextView txtTitle;
public TextView txtType;
public TextView txtFor;
public RatingBar rating;
public ViewGroup layoutRoot;
public ImageView imgLogo;
public ViewHolder(View view) {
layoutRoot = (ViewGroup) view.findViewById(R.id.layoutRoot);
txtTitle = (TextView) view.findViewById(R.id.txtTitle);
txtType = (TextView) view.findViewById(R.id.txtType);
txtFor = (TextView) view.findViewById(R.id.txtFor);
rating = (RatingBar) view.findViewById(R.id.rate);
imgLogo = (ImageView) view.findViewById(R.id.imgLogo);
}
public void fill(final ArrayAdapter<StructRemedy> adapter, final StructRemedy item, final int position) {
txtTitle.setText(item.title);
txtType.setText(item.type);
txtFor.setText(item.use);
rating.setRating(item.rateValue);
//imgLogo.setImageBitmap(bm);
layoutRoot.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(G.currentActivity, ActivitySelect.class);
intent.putExtra("POSITION", position);
G.currentActivity.startActivity(intent);
}
});
}
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
StructRemedy item = getItem(position);
if (convertView == null) {
convertView = G.inflater.inflate(R.layout.adapter_notes, parent, false);
holder = new ViewHolder(convertView);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.fill(this, item, position);
return convertView;
}
}
import java.util.ArrayList;
导入android.content.Intent;
导入android.view.view;
导入android.view.view.OnClickListener;
导入android.view.ViewGroup;
导入android.widget.ArrayAdapter;
导入android.widget.ImageView;
导入android.widget.RatingBar;
导入android.widget.TextView;
公共类适配器remedy扩展ArrayAdapter{
公共AdapterRemedy(ArrayList补救措施){
super(G.context、R.layout、adapter_notes、补救措施);
}
私有静态类视图持有者{
公共文本视图txtTitle;
公共文本视图txtType;
公共文本视图txtFor;
公共评级栏评级;
公共视图组layoutRoot;
公共图像视图imgLogo;
公共视图持有者(视图){
layoutRoot=(ViewGroup)view.findViewById(R.id.layoutRoot);
txtTitle=(TextView)view.findViewById(R.id.txtTitle);
txtType=(TextView)view.findViewById(R.id.txtType);
txtFor=(TextView)view.findViewById(R.id.txtFor);
rating=(RatingBar)view.findViewById(R.id.rate);
imgLogo=(ImageView)view.findViewById(R.id.imgLogo);
}
公共空白填充(最终阵列适配器、最终结构补救项、最终整型位置){
txtTitle.setText(项目名称);
txtType.setText(item.type);
txtFor.setText(item.use);
额定值。设定额定值(项目。额定值);
//设置图像位图(bm);
setOnClickListener(新的OnClickListener(){
@凌驾
公共void onClick(视图){
意向意向=新意向(G.currentActivity,ActivitySelect.class);
意图。额外(“位置”,位置);
G.currentActivity.startActivity(意向);
}
});
}
}
@凌驾
公共视图getView(int位置、视图转换视图、视图组父视图){
视窗座;
StructRemedy item=getIt
adapter.notifyDataSetChanged();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lstContent = (ListView) findViewById(R.id.lstContent);
randomPopulation();
}
public AdapterRemedy(ArrayList<StructRemedy> remedies) {
super(G.context, R.layout.adapter_notes, remedies);
}
public AdapterRemedy(context,ArrayList<StructRemedy> remedies) {
super(context, R.layout.adapter_notes, remedies);
}
adapter = new AdapterRemedy(this,remedies);
lstContent.setAdapter(adapter);
adapter.notifyDataSetChanged();