当它进入我的第二个活动时，首先它显示“不幸停止”，然后它做我想做的事情，活动向我展示了真相。那是什么样的错误？我该怎么办？
在我的第一个活动中：
package com.example.mydic;
import android.app.Activity;
import android.graphics.Typeface;
import android.os.Bundle;
import android.text.method.ScrollingMovementMethod;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class Review extends Activity{
private dbHandler db;
private TextView tv;
private Button btn_yes;
private Button btn_no;
private int btn_click;
private int btn_no_click;
private TextView tv_mean;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.review);
db=new dbHandler(this);
tv=(TextView) findViewById(R.id.re_tv_word);
btn_yes=(Button) findViewById(R.id.re_btn_yes);
btn_no=(Button) findViewById(R.id.re_btn_no);
tv_mean=(TextView) findViewById(R.id.re_tv_mean);
tv_mean.setMovementMethod(new ScrollingMovementMethod());
Typeface textfont = Typeface.createFromAsset(getAssets(),"fonts/bnaznnbd.ttf");
btn_yes.setTypeface(textfont);
btn_no.setTypeface(textfont);
db.open();
tv.setText(db.First_record_Review());
db.close();
tv_mean.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View arg0) {
db.open();
tv_mean.setText(db.First_record_Review_mean(tv.getText().toString()));
db.close();
}
});
btn_yes.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View arg0) {
btn_click=btn_click+1;
db.open();
db.Review_id_check(tv.getText().toString(), Review.this, btn_click, btn_no_click);
db.close();
db.open();
tv.setText(db.Move_To_Next(tv.getText().toString()));
db.close();
tv_mean.setText("نمایش معنا");
}
});
btn_no.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View arg0) {
btn_no_click=btn_no_click+1;
String word=tv.getText().toString();
db.open();
String mean=db.First_record_Review_mean(word);
db.Review_id_check(tv.getText().toString(), Review.this, btn_click, btn_no_click);
db.Review_Add_To_Fav(word, mean , getApplicationContext());
tv.setText(db.Move_To_Next(tv.getText().toString()));
db.close();
tv_mean.setText("نمایش معنا");
}
});
}
@Override
protected void onResume() {
super.onResume();
}
}
在我的第二个活动中：
package com.example.mydic;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class Result extends Activity{
private dbHandler db;
private TextView tv_all;
public static TextView tv_true;
public static TextView tv_false;
private Button btn_main;
private Button btn_fav;
private String tc;
private String fc;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.result);
Bundle ex=getIntent().getExtras();
tc=ex.getString("tc");
fc=ex.getString("fc");
db=new dbHandler(this);
tv_all=(TextView) findViewById(R.id.res_tv_all_count);
tv_true=(TextView) findViewById(R.id.res_tv_true);
tv_false=(TextView) findViewById(R.id.res_tv_false);
btn_main=(Button) findViewById(R.id.res_btn_main);
btn_fav=(Button) findViewById(R.id.res_btn_fav);
db.open();
tv_all.setText(String.valueOf(db.Review_all_count()));
db.close();
tv_false.setText(fc);
tv_true.setText(tc);
btn_main.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View arg0) {
tv_false.setText("");
tv_true.setText("");
tv_all.setText("");
Intent i=new Intent(Result.this, Main.class);
startActivity(i);
}
});
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
}
}
在我的 DBHandler 中：
public String First_record_Review(){
Cursor c = database.rawQuery( "SELECT * FROM test", null);
c.moveToFirst();
String name=c.getString(1);
return name;
}
public String meaning(String word){
Cursor c = database.rawQuery( "SELECT * FROM test where word Like '"+word+"'", null);
c.moveToFirst();
String name=c.getString(2);
return name;
}
public void add_to_fav_Review(String word, Context context){
Cursor c = database.rawQuery( "SELECT * FROM test2 WHERE name Like '"+word+"'", null);
if(c.moveToFirst()){
Toast.makeText(context, "قبلا هم این لغت را بلد نبودید!", Toast.LENGTH_LONG).show();
}else{
ContentValues cv=new ContentValues();
cv.put(dbhelper.scname, word);
cv.put(dbhelper.scmean, meaning(word));
database.insert(dbhelper.stblname, dbhelper.scname, cv);
Toast.makeText(context, "لغت در لیست لغات ویژه ثبت شد", Toast.LENGTH_LONG).show();
}
}
public String Review_id(String word){
Cursor c = database.rawQuery( "SELECT * FROM test WHERE word Like '"+word+"'", null);
c.moveToFirst();
String r=c.getString(0);
return r;
}
public String Move_To_Next(String word){
Cursor c = database.rawQuery( "select * from test where id>"+Review_id(word), null);
c.moveToFirst();
String t=c.getString(1);
return t;
}
public String Review_id_check(String word, Context activity, int yes_count, int no_count){
Cursor c = database.rawQuery( "select * from test where id>"+Review_id(word), null);
if(c.moveToFirst()){
return null;
}else{
Intent res=new Intent(activity, Result.class);
res.putExtra("tc", yes_count+"");
res.putExtra("fc", no_count+"");
activity.startActivity(res);
return null;
}
}
public String First_record_Review_mean(String word){
Cursor c = database.rawQuery( "SELECT * FROM test where word Like '"+word+"'", null);
c.moveToFirst();
String name=c.getString(2);
return name;
}
public Integer Review_all_count(){
Cursor c = database.rawQuery( "SELECT * FROM test", null);
int name=c.getCount();
return name;
}
public void Review_Add_To_Fav(String word, String mean, Context context){
Cursor c = database.rawQuery( "SELECT * FROM test2 WHERE name Like '"+word+"'", null);
if(c.moveToFirst()){
}else{
ContentValues cv=new ContentValues();
cv.put(dbhelper.scname, word);
cv.put(dbhelper.scmean, mean);
database.insert(dbhelper.stblname, dbhelper.scname, cv);
Toast.makeText(context, "نچ نچ نچ", Toast.LENGTH_LONG).show();
}
}
更新：
我将日志猫另存为txt，它是这样的：
09-10 19:46:14.757: E/AndroidRuntime(7146): 在 android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:50)
我的完整错误：
最新更新：
我认为方法 db.Move_to_Next 中的错误
因为：
09-10 20:23:00.601：E/AndroidRuntime(19444)：在 com.example.mydic.dbHandler。Move_To_Next (dbHandler.java:652)