这是我创建的两个类“DatabaseHelper”包含我创建数据库和表的查询，我的主要活动名为“Home”，这就是我创建变量“myDB”并实例化调用在“DatabaseHelper”类中创建oncreate函数...但是当我尝试运行我的应用程序时它会崩溃！或者给我错误消息“无法绑定到本地8600 for debugger”plz help
DatabaseHelper：
package com.example.hp.teachme;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class DatabaseHelper extends SQLiteOpenHelper {
public static final String DATABASE_NAME = "Teachme.db";
public static final String TABLE_NAME = "prof_table.db";
public static final String COL_1 = "ID";
public static final String COL_2 = "PRENOM";
public static final String COL_3 = "NOM";
public static final String COL_4 = "TELEPHONE";
public static final String COL_5 = "ADRESSE";
public static final String COL_6 = "MATIERE";
public static final String COL_7 = "NIVEAU";
public DatabaseHelper(Context context){
super(context, DATABASE_NAME, null, 1);
SQLiteDatabase db = this.getWritableDatabase();
}
@Override
public void onCreate(SQLiteDatabase db){
db.execSQL("create table " + TABLE_NAME +" (ID INTEGER PRIMARY KEY AUTOINCREMENT, PRENOM TEXT, NOM TEXT, TELEPHONE TEXT, ADRESSE TEXT, MATIERE TEXT, NIVEAU TEXT)");
}
@Override
public void onUpgrade(SQLiteDatabase db,int oldVersion,int newVersion){
db.execSQL("DROP TABLE IF EXISTS "+TABLE_NAME);
onCreate(db);
}
}
主页：
package com.example.hp.teachme;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class Home extends AppCompatActivity {
DatabaseHelper myDb;
Button prof,etudiant;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
myDb = new DatabaseHelper(this);
prof=(Button)findViewById(R.id.homme_prof);
etudiant=(Button)findViewById(R.id.homme_etudiant);
prof.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent=new Intent(Home.this,login.class);
startActivity(intent);
}
});
etudiant.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent=new Intent(Home.this,recherche_map.class);
startActivity(intent);
}
});
}
}
Stacktrace：
--------- beginning of crash
12-13 22:49:25.760 1634-1634/com.example.hp.teachme E/AndroidRuntime: FATAL
EXCEPTION: main
Process: com.example.hp.teachme, PID: 1634
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.hp.teachme/com.example.hp.teachme.Home}: android.database.sqlite.SQLiteException: unknown database prof_table (code 1): , while compiling: create table prof_table.db (ID INTEGER PRIMARY KEY AUTOINCREMENT, PRENOM TEXT, NOM TEXT, TELEPHONE TEXT, ADRESSE TEXT, MATIERE TEXT, NIVEAU TEXT)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2464)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2524)
at android.app.ActivityThread.access$900(ActivityThread.java:154)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1391)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:234)
at android.app.ActivityThread.main(ActivityThread.java:5526)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: android.database.sqlite.SQLiteException: unknown database prof_table (code 1): , while compiling: create table prof_table.db (ID INTEGER PRIMARY KEY AUTOINCREMENT, PRENOM TEXT, NOM TEXT, TELEPHONE TEXT, ADRESSE TEXT, MATIERE TEXT, NIVEAU TEXT)
at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:893)
at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:504)
at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1674)
at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1605)
at com.example.hp.teachme.DatabaseHelper.onCreate(DatabaseHelper.java:27)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:251)
at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:163)
at com.example.hp.teachme.DatabaseHelper.<init>(DatabaseHelper.java:22)
at com.example.hp.teachme.Home.onCreate(Home.java:18)
at android.app.Activity.performCreate(Activity.java:6285)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2417)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2524)
at android.app.ActivityThread.access$900(ActivityThread.java:154)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1391)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:234)
at android.app.ActivityThread.main(ActivityThread.java:5526)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
答案 0 :(得分：1)
我通过简单地修改“DatabaseHelper”类中的这一行解决了这个问题：
public static final String TABLE_NAME = "prof_table.db";
并改为：
public static final String TABLE_NAME = "prof_table";
愚蠢的错误真的好笑