java查询SearchView崩溃（尝试实现SearchView操作栏）
一切正常，只是当我尝试在我的应用程序上搜索时，它崩溃了。问题出在方法onQueryTextChange中，请帮助我解决它：
main活动
public class MainActivity extends AppCompatActivity implements AdapterView.OnItemClickListener, SearchView.OnQueryTextListener {
private PackageManager packageManager = null;
private List<ApplicationInfo> applist = null;
private ApplicationAdapter listadaptor = null;
private static final int REQUEST_CAMERA_PERMISSION = 200;
Button goSettings;
ListView listApps;
Context context;
Button go_AndroBooster,goPerms,lockAll,unlockAll,goLogs;
Intent i;
private AccountHeader headerResult = null;
private Drawer result = null;
private MiniDrawer miniResult = null;
private CrossfadeDrawerLayout crossfadeDrawerLayout = null;
MaterialProgressBar loadingBar;
ColorManager colorManager;
RelativeLayout mainLayout;
ArrayList<ApplicationInfo> items;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context = MainActivity.this;
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
colorManager = new ColorManager(this);
setSupportActionBar(toolbar);
mainLayout = (RelativeLayout) findViewById(R.id.mainLayout);
packageManager = getPackageManager();
listApps = (ListView) findViewById(R.id.listApps);
go_AndroBooster = (Button) findViewById(R.id.go_booster);
goPerms = (Button) findViewById(R.id.goPerms);
lockAll = (Button) findViewById(R.id.lock_all);
unlockAll = (Button) findViewById(R.id.unlock_all);
loadingBar = (MaterialProgressBar) findViewById(R.id.loadingBar);
goLogs = (Button) findViewById(R.id.goLogs);
goSettings = (Button) findViewById(R.id.lockSettings);
listApps.setItemsCanFocus(true);
startLockService();
setSupportActionBar(toolbar);
//set the back arrow in the toolbar
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setTitle(R.string.app_name);
getSupportActionBar().setBackgroundDrawable(new ColorDrawable(Color.parseColor("#25517d")));
final IProfile profile2 = new ProfileDrawerItem().withIcon(R.drawable.user_icon);
// Create the AccountHeader
headerResult = new AccountHeaderBuilder()
.withActivity(this)
.withTranslucentStatusBar(false)
.withHeaderBackground(R.drawable.header)
.addProfiles(profile2)
.build();
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
result = new DrawerBuilder()
.withActivity(this)
.withToolbar(toolbar)
.withDrawerLayout(R.layout.crossfade_material_drawer)
.withHasStableIds(true)
.withDrawerWidthDp(72)
.withGenerateMiniDrawer(true)
.withAccountHeader(headerResult) //set the AccountHeader we created earlier for the header
.addDrawerItems(
new PrimaryDrawerItem().withName(R.string.Home).withIcon(R.drawable.homee).withIdentifier(1),
new PrimaryDrawerItem().withName(R.string.logs).withIcon(R.drawable.cleanapp).withIdentifier(2),
new PrimaryDrawerItem().withName(R.string.resetpass).withIcon(R.drawable.boost).withIdentifier(3),
new PrimaryDrawerItem().withName(R.string.language).withIcon(R.drawable.share).withIdentifier(4),
new PrimaryDrawerItem().withName(R.string.share).withIcon(R.drawable.rate).withIdentifier(6),
new PrimaryDrawerItem().withName(R.string.rate).withIcon(R.drawable.rate).withIdentifier(7)
// new DividerDrawerItem(),
// new SecondaryDrawerItem().withName(R.string.drawer_item_seventh).withIcon(FontAwesome.Icon.faw_github).withIdentifier(7).withSelectable(false)
) // add the items we want to use with our Drawer
.withSelectedItemByPosition(1)
.withOnDrawerItemClickListener(new Drawer.OnDrawerItemClickListener() {
@Override
public boolean onItemClick(View view, int position, IDrawerItem drawerItem) {
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
if (drawerItem.getIdentifier() == 1) {
// Toast.makeText(MainActivity.this,"2",Toast.LENGTH_LONG).show();
result.closeDrawer();
} else if (drawerItem.getIdentifier() == 2) {
i = new Intent(getApplicationContext(), LogsActivity.class);
startActivity(i);
result.closeDrawer();
} else if (drawerItem.getIdentifier() == 3) {
i = new Intent(getApplicationContext(), SetLockTypeActivity.class);
startActivity(i);
result.closeDrawer();
} else if (drawerItem.getIdentifier() == 4) {
LanguagesDialog languagesDialog = new LanguagesDialog();
languagesDialog.show(getFragmentManager(), "LanguagesDialogFragment");
} else if (drawerItem.getIdentifier() == 6) {
Intent sharingIntent = new Intent(Intent.ACTION_SEND);
sharingIntent.setType("text/plain");
sharingIntent.putExtra(安卓.content.Intent.EXTRA_TEXT, "http://play.google.com/store/apps/details?id="
+ getPackageName());
sharingIntent.putExtra(安卓.content.Intent.EXTRA_SUBJECT, "Subject");
startActivity(Intent.createChooser(sharingIntent, getResources().getText(R.string.shareusing)));
result.closeDrawer();
}else if (drawerItem.getIdentifier() == 7) {
Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://play.google.com/store/apps/details?id="
+ getPackageName()));
startActivity(browserIntent);
result.closeDrawer();
}
//
//
return false;
}
})
.withSavedInstance(savedInstanceState)
.withShowDrawerOnFirstLaunch(false)
.build();
//get out our drawerLyout
crossfadeDrawerLayout = (CrossfadeDrawerLayout) result.getDrawerLayout();
//define maxDrawerWidth
crossfadeDrawerLayout.setMaxWidthPx(DrawerUIUtils.getOptimalDrawerWidth(this));
//add second view (which is the miniDrawer)
MiniDrawer miniResult = result.getMiniDrawer();
//build the view for the MiniDrawer
View view = miniResult.build(this);
//set the background of the MiniDrawer as this would be transparent
view.setBackgroundColor(UIUtils.getThemeColorFromAttrOrRes(this, com.mikepenz.materialdrawer.R.attr.material_drawer_background, com.mikepenz.materialdrawer.R.color.material_drawer_background));
//we do not have the MiniDrawer view during CrossfadeDrawerLayout creation so we will add it here
crossfadeDrawerLayout.getSmallView().addView(view, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
//define the crossfader to be used with the miniDrawer. This is required to be able to automatically toggle open / close
miniResult.withCrossFader(new ICrossfader() {
@Override
public void crossfade() {
boolean isFaded = isCrossfaded();
crossfadeDrawerLayout.crossfade(400);
//only close the drawer if we were already faded and want to close it now
if (isFaded) {
result.getDrawerLayout().closeDrawer(GravityCompat.START);
}
}
@Override
public boolean isCrossfaded() {
return crossfadeDrawerLayout.isCrossfaded();
}
});
//hook to the crossfade event
crossfadeDrawerLayout.withCrossfadeListener(new CrossfadeDrawerLayout.CrossfadeListener() {
@Override
public void onCrossfade(View containerView, float currentSlidePercentage, int slideOffset) {
Log.e("CrossfadeDrawerLayout", "crossfade: " + currentSlidePercentage + " - " + slideOffset);
}
});
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
startReqUsageStat();
}
}, 3000);
lockAll.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
ManageLockedApps.lockAllApps(context);
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
finish();
}
}, 2000);
}
});
unlockAll.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
ManageLockedApps.resetLockedApps(context);
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
finish();
}
}, 2000);
}
});
goPerms.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent i = new Intent(MainActivity.this, RequestPermission.class);
startActivity(i);
}
});
goLogs.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent i = new Intent(MainActivity.this, LogsActivity.class);
startActivity(i);
}
});
go_AndroBooster.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startApplication("");
}
});
goSettings.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent i = new Intent(MainActivity.this, SettingsActivity.class);
startActivity(i);
finish();
}
});
applist = checkForLaunchIntent(packageManager.getInstalledApplications(PackageManager.GET_META_DATA));
listadaptor = new ApplicationAdapter(MainActivity.this,
R.layout.app_list_item, applist);
final Handler handler1 = new Handler();
handler1.postDelayed(new Runnable() {
@Override
public void run() {
new LoadApplications().execute();
}
}, 1500);
new Thread(new Runnable() {
@Override
public void run() {
if (ActivityCompat.checkSelfPermission(context, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(context, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUEST_CAMERA_PERMISSION);
}
if (ActivityCompat.checkSelfPermission(context, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(context, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUEST_CAMERA_PERMISSION);
}
}
}).start();
}
@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);
final MenuItem item = menu.findItem(R.id.action_search);
final SearchView searchView = (SearchView) MenuItemCompat.getActionView(item);
searchView.setOnQueryTextListener(this);
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();
return super.onOptionsItemSelected(item);
}
private void startLockService() {
if (!isMyServiceRunning(LockService.class)){
context.startService(new Intent(context, LockService.class));
}
}
private void stopLockService() {
context.stopService(new Intent(context, LockService.class));
}
private void startReqUsageStat(){
if (安卓.os.Build.VERSION.SDK_INT >= 安卓.os.Build.VERSION_CODES.LOLLIPOP) {
if (!checkUsageStatsPermission()){
Intent intent = new Intent(Settings.ACTION_USAGE_ACCESS_SETTINGS);
startActivity(intent);
Toast.makeText(context,getString(R.string.please_give_usage_Stats),Toast.LENGTH_LONG).show();
}
}
} public boolean checkUsageStatsPermission(){
final UsageStatsManager usageStatsManager = (UsageStatsManager) context.getSystemService(Context.USAGE_STATS_SERVICE);
final List<UsageStats> queryUsageStats = usageStatsManager.queryUsageStats(UsageStatsManager.INTERVAL_DAILY, 0, System.currentTimeMillis());
return !queryUsageStats.isEmpty();
}
public void startApplication(String packageName)
{
try
{
Intent intent = new Intent("安卓.intent.action.MAIN");
intent.addCategory("安卓.intent.category.LAUNCHER");
intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
List<ResolveInfo> resolveInfoList = getPackageManager().queryIntentActivities(intent, 0);
for(ResolveInfo info : resolveInfoList)
if(info.activityInfo.packageName.equalsIgnoreCase(packageName))
{
launchComponent(info.activityInfo.packageName, info.activityInfo.name);
return;
}
showInMarket(packageName);
}
catch (Exception e)
{
showInMarket(packageName);
}
}
public String getPattern() {
File file = new File("/data/data/com.project.applocker/files/pattern");
StringBuilder text = new StringBuilder();
try {
BufferedReader br = new BufferedReader(new FileReader(file));
String line;
while ((line = br.readLine()) != null) {
text.append(line);
}
br.close();
} catch (IOException e) {
Log.d("okuma hatası", "no 1");
}
return text.toString();
}
private void launchComponent(String packageName, String name)
{
Intent intent = new Intent("安卓.intent.action.MAIN");
intent.addCategory("安卓.intent.category.LAUNCHER");
intent.setComponent(new ComponentName(packageName, name));
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
private void showInMarket(String packageName)
{
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + packageName));
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
final List<ApplicationInfo> appsList = context.getPackageManager().getInstalledApplications(0);
final ApplicationInfo data = appsList.get(i);
final SwitchCompat lockApp = (SwitchCompat) view.findViewById(R.id.lockApp);
lockApp.performClick();
}
private boolean isMyServiceRunning(Class<?> serviceClass) {
ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
for (ActivityManager.RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {
if (serviceClass.getName().equals(service.service.getClassName())) {
return true;
}
}
return false;
}
@Override
public boolean onQueryTextSubmit(String query) {
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
ArrayList<ApplicationInfo> templist = new ArrayList<>();
for (ApplicationInfo temp : items){
if (temp.toString().contains(newText.toLowerCase())){
templist.add(temp);
}
ArrayAdapter<ApplicationInfo> adapter = new ArrayAdapter<>(MainActivity.this, 安卓.R.layout.simple_list_item_1,applist);
listApps.setAdapter(adapter);
return true;
}
return true;
};
private class LoadApplications extends AsyncTask<Void, Void, Void> {
@Override
protected Void doInBackground(Void... params) {
applist = checkForLaunchIntent(packageManager.getInstalledApplications(PackageManager.GET_META_DATA));
listadaptor = new ApplicationAdapter(MainActivity.this,
R.layout.app_list_item, applist);
if(!isMyServiceRunning(LockService.class)){
startLockService();
}
return null;
}
@Override
protected void onCancelled() {
super.onCancelled();
}
@Override
protected void onPostExecute(Void result) {
listApps.setAdapter(listadaptor);
listApps.setOnItemClickListener(MainActivity.this);
loadingBar.setVisibility(View.INVISIBLE);
super.onPostExecute(result);
}
@Override
protected void onPreExecute() {
loadingBar.setVisibility(View.VISIBLE);
super.onPreExecute();
}
@Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
}
String[] alphabet = "abcdefghijklmnopqrstuvwxyz".split("");
@Override
public void onPause() {
super.onPause();
}
@Override
public void onResume() {
super.onResume();
}
@Override
public void onDestroy() {
super.onDestroy();
startLockService();
}
private List<ApplicationInfo> checkForLaunchIntent(List<ApplicationInfo> list) {
ArrayList<ApplicationInfo> applist = new ArrayList<ApplicationInfo>();
for (ApplicationInfo info : list) {
try {
if (!info.packageName.equals("com.google.安卓.googlequicksearchbox")) {
if (!info.packageName.equals("com.project.applocker")) {
if (!info.packageName.contains("launcher3")) {
if (!info.packageName.contains("launcher")) {//com.google.安卓.googlequicksearchbox
if (!info.packageName.contains("trebuchet")) {
if (null != packageManager.getLaunchIntentForPackage(info.packageName)) {
applist.add(info);
}
}
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
return applist;
}
}
适配器
public class ApplicationAdapter extends ArrayAdapter<ApplicationInfo>{
private List<ApplicationInfo> appsList = null;
private Context context;
private PackageManager packageManager;
List<String> allAppList = null;
List<String> lockedAppList = null;
ColorManager colorManager;
SharedPreferences preferences;
SharedPreferences.Editor editor;
public ApplicationAdapter(Context context, int textViewResourceId,
List<ApplicationInfo> appList) {
super(context, textViewResourceId, appList);
this.context = context;
allAppList = new ArrayList<String>();
colorManager = new ColorManager(context);
lockedAppList = new ArrayList<String>();
this.appsList = appList;
packageManager = context.getPackageManager();
preferences=context.getSharedPreferences("chosen_apps", context.MODE_PRIVATE);
Collections.sort(appsList, new ApplicationInfo.DisplayNameComparator(packageManager));
editor = preferences.edit();
}
@Override
public int getCount() {
return ((null != appsList) ? appsList.size() : 0);
}
@Override
public ApplicationInfo getItem(int position) {
return ((null != appsList) ? appsList.get(position) : null);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, final View convertView, ViewGroup parent) {
View view = convertView;
if (null == view) {
LayoutInflater layoutInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = layoutInflater.inflate(R.layout.app_list_item, null);
}
final ApplicationInfo data = appsList.get(position);
if (null != data) {
ImageView iconview = (ImageView) view.findViewById(R.id.app_icon);
CardView cardViewApps = (CardView) view.findViewById(R.id.cardViewApps);
final SwitchCompat lockApp = (SwitchCompat) view.findViewById(R.id.lockApp);
lockApp.setText(data.loadLabel(packageManager));
iconview.setImageDrawable(data.loadIcon(packageManager));
if(preferences.getBoolean(data.packageName,false)){
lockApp.setChecked(true);
}
else{
lockApp.setChecked(false);
}
lockApp.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
context.stopService(new Intent(context, LockService.class));
if (lockApp.isChecked()){
Log.d("tıklanmış",""+data.packageName);
editor.putBoolean(data.packageName,true).apply();
}
if (!lockApp.isChecked()){
Log.d("silinmiş",""+data.packageName);
editor.putBoolean(data.packageName,false).apply();
}
context.startService(new Intent(context, LockService.class));
}
});
}
return view;
}
private void startLockService() {
context.startService(new Intent(context, LockService.class));
}
private void stopLockService() {
context.stopService(new Intent(context, LockService.class));
}
}
问题在于：
@Override
public boolean onQueryTextChange(String newText) {
ArrayList<ApplicationInfo> templist = new ArrayList<>();
for (ApplicationInfo temp : items){
if (temp.toString().contains(newText.toLowerCase())){
templist.add(temp);
}
ArrayAdapter<ApplicationInfo> adapter = new ArrayAdapter<>(MainActivity.this, 安卓.R.layout.simple_list_item_1,applist);
listApps.setAdapter(adapter);
return true;
}
return true;
};
# 1 楼答案
我认为你的方法应该如下