我目前正在开发一个安卓应用程序。我将在插入数据库的同时显示 toast 消息。但不幸的是，吐司消息没有出现。这是我的代码：
mySQLiteAdapter = new SQLiteAdapter(this);
mySQLiteAdapter.openToRead();
Cursor c = mySQLiteAdapter.getAllContent();
c.moveToLast();
int count1=c.getCount();
if(count1==0)
{
//value not present
Toast.makeText(this, "Now Loading...", Toast.LENGTH_LONG).show();
insertData();
}
else
{
//value present
}
mySQLiteAdapter.close();
insertData() 是将数据插入数据库的方法。有人知道我的代码有什么问题吗？
这是我班级的完整代码：
package com.example.anagramslayer;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageButton;
import android.widget.TextView;
import android.widget.Toast;
public class Main extends Activity implements OnClickListener {
private SQLiteAdapter mySQLiteAdapter;
ImageButton LevelModule;
ImageButton ExitModule;
ImageButton HelpModule;
ImageButton CreditModule;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//TextView listContent = (TextView)findViewById(R.id.listview); //buat nampilin listview
//init buttons
LevelModule = (ImageButton) findViewById(R.id.play_button);
LevelModule.setOnClickListener(this);
ExitModule = (ImageButton) findViewById(R.id.exit_button);
ExitModule.setOnClickListener(this);
HelpModule = (ImageButton) findViewById(R.id.help_button);
HelpModule.setOnClickListener(this);
CreditModule = (ImageButton) findViewById(R.id.credit_button);
CreditModule.setOnClickListener(this);
mySQLiteAdapter = new SQLiteAdapter(this);
AppPreferences AppPref = new AppPreferences(this);
//int x = AppPref.getScore();
//TextView t=(TextView)findViewById(R.id.score);
//t.setText(x);
//checking values exists
mySQLiteAdapter = new SQLiteAdapter(this);
mySQLiteAdapter.openToRead();
Cursor c = mySQLiteAdapter.getAllContent();
c.moveToLast();
int count1=c.getCount();
if(count1==0)
{
//value not present
Toast.makeText(this, "Now Loading...", Toast.LENGTH_LONG).show();
insertData();
}
else
{
//value present
}
mySQLiteAdapter.close();
//end of checking value exists
mySQLiteAdapter = new SQLiteAdapter(this);
mySQLiteAdapter.openToRead();
//String contentRead = mySQLiteAdapter.queueAll(); //buat nampilin listview
mySQLiteAdapter.close();
//listContent.setText(contentRead); //buat nampilin listview
}
@Override
public void onClick(View v) {
switch(v.getId()){
case R.id.play_button:
startActivity(new Intent(Main.this, LevelList.class));
finish();
break;
case R.id.exit_button:
finish();
System.exit(0);
break;
case R.id.help_button:
startActivity(new Intent(Main.this, Help.class));
finish();
break;
case R.id.credit_button:
startActivity(new Intent(Main.this, Credit.class));
finish();
break;
}
}
// TODO Auto-generated method stub
private void insertData() {
//insert record
mySQLiteAdapter = new SQLiteAdapter(this);
mySQLiteAdapter.openToWrite();
mySQLiteAdapter.insert("apel", "Peal", "the competitor of samsung", "0", "1", "com.example.anagramslayer:drawable/hint1_1");
mySQLiteAdapter.insert("semangka", "Game Sank", "it's big and green", "0", "1", "com.example.anagramslayer:drawable/hint1_2");
mySQLiteAdapter.insert("anggur", "Run Gag", "ferment it, it will become wine anggur run gag ferment it, it will become wine","0", "1", "com.example.anagramslayer:drawable/hint1_3");
mySQLiteAdapter.insert("pisang", "Gasp In", "it's yellow and loved by minion", "0", "1", "com.example.anagramslayer:drawable/hint1_4");
mySQLiteAdapter.insert("melon", "Lemon", "it's round, quite big, and green", "0", "1", "com.example.anagramslayer:drawable/hint1_5");
mySQLiteAdapter.insert("alpukat", "A Talk Up", "it tastes plain. Usually, people make juice or ice drink from it", "0", "1", "com.example.anagramslayer:drawable/hint1_6");
mySQLiteAdapter.insert("mangga", "Gag Man", "it's green. Sometimes, it tastes sweet or sour", "0", "1", "com.example.anagramslayer:drawable/hint1_7");
mySQLiteAdapter.insert("cokelat", "A Locket", "its name is the same with its color", "0", "1", "com.example.anagramslayer:drawable/hint1_8");
mySQLiteAdapter.insert("persik", "Pikers", "in japan, people call it momo fruit", "0", "1", "com.example.anagramslayer:drawable/hint1_9");
mySQLiteAdapter.insert("salak", "Ask La", "its skin is like a snake skin", "0", "1", "com.example.anagramslayer:drawable/hint1_10");
mySQLiteAdapter.insert("kurma", "A Murk", "you can find this fruit in california or midle east", "0", "1", "com.example.anagramslayer:drawable/hint1_11");
mySQLiteAdapter.insert("durian", "Run Aid", "spike skinned fruit and it smells bad", "0", "1", "com.example.anagramslayer:drawable/hint1_12");
mySQLiteAdapter.insert("cempedak", "Packed Me", "this fruit looks like a jackfruit", "0", "1", "com.example.anagramslayer:drawable/hint1_13");
mySQLiteAdapter.insert("jambu", "Um Jab", "it cures scarlet fever", "0", "1", "com.example.anagramslayer:drawable/hint1_14");
mySQLiteAdapter.insert("kelapa", "Lake Pa", "you usually will find this fruit in a beach", "0", "1", "com.example.anagramslayer:drawable/hint1_15");
//end of database
mySQLiteAdapter.close();
//end of insert record
}
}