我的应用程序在 4.0 版本中运行良好，但如果我在 2.2 中使用它会显示我的应用程序强制关闭。检查logcat时显示tts函数错误，TTS抛出NPE。我也初始化了TTS初始化。低版本只会出现问题。
这是 myactivity.java
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list_item2);
mDbHelper = new GinfyDbAdapter(this);
share = (Button)findViewById(R.id.btnget);
btnadd1 = (Button)findViewById(R.id.btnadd);
lv = getListView();
share.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v) {
StringBuilder result = new StringBuilder();
if(count>0)
{
for(int i=0;i<count;i++)
{Log.i("checked content Inside on click of share ",""+aa.get(i));
if(mCheckStates.get(i)==true)
{
result.append("Title:");
result.append(bb.get(i));
result.append("\n");
result.append("Content:");
result.append(aa.get(i));
result.append("\n");
}
}
}
// }
Log.i("result is",""+result);
if(result!=null)
{
showAlertView(result.toString());
}
else
{
Log.i("result is","null");
}
}
});
btnadd1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
createProject();
}
});
mDbHelper.open();
fillData();
registerForContextMenu(getListView());
}
@SuppressLint("NewApi")
@SuppressWarnings("deprecation")
private void fillData() {
mDbHelper.open();
Cursor projectsCursor = mDbHelper.fetchAllProjects();
count = projectsCursor.getCount();
Log.i(".......fill data method logging now ......",""+count);
if (projectsCursor.moveToFirst()) {
do {
int col1 = projectsCursor.getColumnIndex("title");
String title = projectsCursor.getString(col1 );
bb.add(title);
int col2 = projectsCursor.getColumnIndex("content");
String content = projectsCursor.getString(col2 );
aa.add(content);
Log.i("...........................All COntent",content);
} while (projectsCursor.moveToNext());
}
//startManagingCursor(projectsCursor);
// Create an array to specify the fields we want to display in the list (only TITLE)
String[] from = new String[]{GinfyDbAdapter.CATEGORY_COLUMN_TITLE,GinfyDbAdapter.CATEGORY_COLUMN_CONTENT,GinfyDbAdapter.CATEGORY_COLUMN_DATE};
int[] to = new int[]{R.id.text22,R.id.text11,R.id.date};
dataAdapter = new CustomAdapter (YourPrayerActivity .this, R.layout.row2, projectsCursor, from, to);
setListAdapter(dataAdapter);
EditText myFilter = (EditText) findViewById(R.id.myFilter);
myFilter.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {
}
public void beforeTextChanged(CharSequence s, int start,
int count, int after) {
}
public void onTextChanged(CharSequence s, int start,
int before, int count) {
dataAdapter.getFilter().filter(s.toString());
}
});
dataAdapter.setFilterQueryProvider(new FilterQueryProvider() {
public Cursor runQuery(CharSequence constraint) {
return mDbHelper.fetchProjectByName(constraint.toString());
}
});
tts = new TextToSpeech(this, this);
final ListView lv = getListView();
txtText = (TextView) findViewById(R.id.text11);
lv.setTextFilterEnabled(true);
}
@Override
public void onDestroy() {
// Don't forget to shutdown tts!
if (tts != null) {
tts.stop();
tts.shutdown();
}
super.onDestroy();
}
public void onInit(int status) {
if (status == TextToSpeech.SUCCESS) {
int result = tts.setLanguage(Locale.US);
if (result == TextToSpeech.LANG_MISSING_DATA
|| result == TextToSpeech.LANG_NOT_SUPPORTED) {
Log.e("TTS", "This Language is not supported");
} else {
//btnaudioprayer.setEnabled(true);
speakOut();
}
} else {
Log.e("TTS", "Initilization Failed!");
}
}
/*@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
super.onCreateOptionsMenu(menu);
MenuInflater mi = getMenuInflater();
mi.inflate(R.menu.activity_main1, menu);
return true;
}
@Override
public boolean onMenuItemSelected(int featureId, MenuItem item) {
Intent newActivity = new Intent(YourPrayerActivity.this,AndroidTabLayoutActivity1.class);
startActivity(newActivity);
return super.onMenuItemSelected(featureId, item);
}*/
private void createProject() {
Intent i = new Intent(this, AddyourprayerActivity.class);
startActivityForResult(i, ACTIVITY_CREATE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
fillData();
}
private void speakOut() {
// String text = txtText.getText().toString();
// String text = "Android speech";
tts.speak(typed, TextToSpeech.QUEUE_FLUSH, null);
}
class CustomAdapter extends SimpleCursorAdapter implements CompoundButton.OnCheckedChangeListener {
private LayoutInflater mInflater;
private ListView lv;
@SuppressWarnings("deprecation")
public CustomAdapter(Context context, int layout, Cursor c, String[] from, int[] to)
{
super(context, layout, c, from, to);
mInflater= LayoutInflater.from(context);
mCheckStates = new SparseBooleanArray(c.getCount());
// TODO Auto-generated constructor stub
}
@Override
public void bindView(View view, Context context, final Cursor cursor){
int row_id = cursor.getColumnIndex("_id"); //Your row id (might need to replace)
TextView tv = (TextView) view.findViewById(R.id.text22);
final TextView tv1 = (TextView) view.findViewById(R.id.text11);
TextView tv2 = (TextView) view.findViewById(R.id.date);
CheckBox cb = (CheckBox) view.findViewById(R.id.checkbox);
int col1 = cursor.getColumnIndex("title");
final String title = cursor.getString(col1 );
int col2 = cursor.getColumnIndex("content");
final String content = cursor.getString(col2 );
int col3 = cursor.getColumnIndex("date");
final String date = cursor.getString(col3);
cb.setTag(cursor.getPosition());
cb.setChecked(mCheckStates.get(cursor.getPosition(), false));
cb.setOnCheckedChangeListener(this);
// TextView tv2 = (TextView) view.findViewById(R.id.text3);
//cursor.getColumnName(1)
tv.setText( title);
tv1.setText( content);
tv2.setText(date);
//tv2.setText( ""+cursor.getColumnIndex(GinfyDbAdapter.CATEGORY_COLUMN_COUNT));
// String[] from = new String[]{GinfyDbAdapter.CATEGORY_COLUMN_TITLE, GinfyDbAdapter.CATEGORY_COLUMN_CONTENT, GinfyDbAdapter.CATEGORY_COLUMN_COUNT}
ImageButton button = (ImageButton) view.findViewById(R.id.sms1);
button.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v){
StringBuffer sb2 = new StringBuffer();
sb2.append("Title:");
sb2.append(Html.fromHtml(title));
sb2.append(",Content:");
sb2.append(Html.fromHtml(content));
sb2.append("\n");
String strContactList1 = (sb2.toString().trim());
sendsmsdata(strContactList1);
}
});
ImageButton button1 = (ImageButton) view.findViewById(R.id.mail1);
button1.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v){
StringBuffer sb3 = new StringBuffer();
sb3.append("Title:");
sb3.append(Html.fromHtml(title));
sb3.append(",Content:");
sb3.append(Html.fromHtml(content));
sb3.append("\n");
String strContactList2 = (sb3.toString().trim());
sendmaildata(strContactList2);
}
});
ImageButton button2 = (ImageButton) view.findViewById(R.id.btnaudioprayer1);
button2.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v){
//ADD STUFF HERE you know which row is clicked. and which button
typed = content;
speakOut();
}
});
}
在这里，我在使用 android 2.2 时粘贴了我的 logcat 错误
09-24 12:51:45.074: E/AndroidRuntime(324): FATAL EXCEPTION: main
09-24 12:51:45.074: E/AndroidRuntime(324): java.lang.NullPointerException: println needs a message
09-24 12:51:45.074: E/AndroidRuntime(324): at android.util.Log.println_native(Native Method)
09-24 12:51:45.074: E/AndroidRuntime(324): at android.util.Log.i(Log.java:143)
09-24 12:51:45.074: E/AndroidRuntime(324): at android.speech.tts.TextToSpeech.speak(TextToSpeech.java:720)
09-24 12:51:45.074: E/AndroidRuntime(324): at com.example.tesing.YourPrayerActivity.speakOut(YourPrayerActivity.java:258)
09-24 12:51:45.074: E/AndroidRuntime(324): at com.example.tesing.YourPrayerActivity.onInit(YourPrayerActivity.java:212)
09-24 12:51:45.074: E/AndroidRuntime(324): at android.speech.tts.TextToSpeech$1.onServiceConnected(TextToSpeech.java:451)
09-24 12:51:45.074: E/AndroidRuntime(324): at android.app.ActivityThread$PackageInfo$ServiceDispatcher.doConnected(ActivityThread.java:1247)
09-24 12:51:45.074: E/AndroidRuntime(324): at android.app.ActivityThread$PackageInfo$ServiceDispatcher$RunConnection.run(ActivityThread.java:1264)
09-24 12:51:45.074: E/AndroidRuntime(324): at android.os.Handler.handleCallback(Handler.java:587)
09-24 12:51:45.074: E/AndroidRuntime(324): at android.os.Handler.dispatchMessage(Handler.java:92)
09-24 12:51:45.074: E/AndroidRuntime(324): at android.os.Looper.loop(Looper.java:123)
09-24 12:51:45.074: E/AndroidRuntime(324): at android.app.ActivityThread.main(ActivityThread.java:4627)
09-24 12:51:45.074: E/AndroidRuntime(324): at java.lang.reflect.Method.invokeNative(Native Method)
09-24 12:51:45.074: E/AndroidRuntime(324): at java.lang.reflect.Method.invoke(Method.java:521)
09-24 12:51:45.074: E/AndroidRuntime(324): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
09-24 12:51:45.074: E/AndroidRuntime(324): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
09-24 12:51:45.074: E/AndroidRuntime(324): at dalvik.system.NativeStart.main(Native Method)
它在这些行中显示错误 speakOut();