Java Android SQLite Emulator无法为数据库项目运行

大家好，我是android编码的新手，现在我正在学习SQLite做登录系统…我遇到的问题是模拟器甚至不能运行这个项目。它显示了来自此代码的“欢迎\u错误\u消息”

Toast.makeText(this,getString(R.string.welcome_error_message),Toast.LENGTH_SHORT).show()

仅供参考，我运行ADB模拟器 现在，我不知道到底是什么问题，我尝试更新SDK manager中的所有内容，并从现有问题帖子中找到解决方案，但没有找到与我的项目相同的解决方案

能为我提出解决办法吗

请在下面找到我的来源

[MainActivity.java]

  public class MainActivity extends AppCompatActivity {

    Button mChangePassword; TextView mUsername; private UserManager mManager; User mUser;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mManager = new UserManager(this);
        mUser = new User();

        mChangePassword = (Button) findViewById(R.id.change_password);
        mUsername = (TextView) findViewById(R.id.say_hi);

        Bundle args = getIntent().getExtras();

        if (null == args) {
            Toast.makeText(this, getString(R.string.welcome_error_message),
                    Toast.LENGTH_SHORT).show();
            finish();
        } else {
            mUsername.setText(getString(R.string.say_hi) + " " +
                    args.getString(User.Column.USERNAME));

            mUser.setId(args.getInt(User.Column.ID));
            mUser.setUsername(args.getString(User.Column.USERNAME));
        }

        mChangePassword.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showDialogPassword();
            }
        });
    }
}

[User.java]

 public class User {
    public static final String TABLE = "user";

    public class Column {
        public static final String ID = BaseColumns._ID;
        public static final String USERNAME = "username";
        public static final String PASSWORD = "password";
    }

    private int id; private String username; private String password;

    public User(String username, String password) {
        this.username = username;
        this.password = password;
    }

    public User() {}

    public int getId() {return id;}

    public void setId(int id) {this.id = id;}

    public String getUsername() {return username;}

    public void setUsername(String username) {this.username = username;}

    public String getPassword() {return password;}

    public void setPassword(String password) {this.password = password;}
}

[UserManager.java]

public class UserManager extends SQLiteOpenHelper implements UserManagerHelper {
    public static final String TAG = UserManager.class.getSimpleName();
    private SQLiteDatabase mDatabase;

    public UserManager(Context context) {
        super(context, UserManagerHelper.DATABASE_NAME, null, UserManagerHelper.DATABASE_VERSION);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        String CREATE_TABLE_USER = String.format("CREATE TABLE %s " +
                        "(%s INTEGER PRIMARY KEY AUTOINCREMENT, %s TEXT, %s TEXT)" ,
                User.TABLE,
                User.Column.ID,
                User.Column.USERNAME,
                User.Column.PASSWORD
        );

        db.execSQL(CREATE_TABLE_USER);

        Log.i(TAG, CREATE_TABLE_USER);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        String DROP_USER = "DROP TABLE IF EXISTS " + UserManagerHelper.DATABASE_VERSION;

        db.execSQL(DROP_USER);

        Log.i(TAG, DROP_USER);
        onCreate(mDatabase);
    }

    @Override
    public long registerUser(User user) {
        mDatabase = this.getWritableDatabase();

        ContentValues values = new ContentValues();
        values.put(User.Column.USERNAME, user.getUsername());
        values.put(User.Column.PASSWORD, user.getPassword());

        long result = mDatabase.insert(User.TABLE, null, values);
        mDatabase.close();

        return result;
    }

    @Override
    public User checkUserLogin(User user) {
        mDatabase = this.getReadableDatabase();

        Cursor cursor = mDatabase.query(User.TABLE,null,User.Column.USERNAME + " = ? AND " +
                        User.Column.PASSWORD + " = ?",new String[]{user.getUsername(), user.getPassword()},null,null,null);

        User currentUser = new User();

        if (cursor != null) {
            if (cursor.moveToFirst()) {
                currentUser.setId((int) cursor.getLong(0));
                currentUser.setUsername(cursor.getString(1));
                currentUser.setPassword(cursor.getString(2));
                mDatabase.close();
                return currentUser;
            }
        }   
        return null;
    }
}

[UserManagerHelper.interface]

public interface UserManagerHelper {
    public static final String DATABASE_NAME = "ahoy_login";
    public static final int DATABASE_VERSION = 1;
    public long registerUser(User user);
    public User checkUserLogin(User user);
}

[日志]

02-25 13:54:22.657 3297-3297/? E/libprocessgroup: failed to make and chown /acct/uid_10060: Read-only file system
02-25 13:54:22.657 3297-3297/? W/Zygote: createProcessGroup failed, kernel missing CONFIG_CGROUP_CPUACCT?
02-25 13:54:22.658 3297-3297/? I/art: Not late-enabling -Xcheck:jni (already on)
02-25 13:54:22.702 3297-3297/com.gerpeace.databasetest I/InstantRun: Instant Run Runtime started. Android package is com.gerpeace.databasetest, real application class is null.
02-25 13:54:22.704 3297-3297/com.gerpeace.databasetest W/art: Failed to find OatDexFile for DexFile /data/data/com.gerpeace.databasetest/files/instant-run/dex/slice-slice_4-classes.dex ( canonical path /data/data/com.gerpeace.databasetest/files/instant-run/dex/slice-slice_4-classes.dex) with checksum 0x3b5a494f in OatFile /data/data/com.gerpeace.databasetest/cache/slice-slice_4-classes.dex
02-25 13:54:22.903 3297-3297/com.gerpeace.databasetest W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
02-25 13:54:23.033 3297-3317/com.gerpeace.databasetest D/OpenGLRenderer: Render dirty regions requested: true

                                                                         [ 02-25 13:54:23.034  3297: 3297 D/         ]
                                                                         HostConnection::get() New Host Connection established 0xac67c160, tid 3297
02-25 13:54:23.037 3297-3297/com.gerpeace.databasetest D/Atlas: Validating map...

                                                                [ 02-25 13:54:23.075  3297: 3317 D/         ]
                                                                HostConnection::get() New Host Connection established 0xaf20e1f0, tid 3317
02-25 13:54:23.077 3297-3317/com.gerpeace.databasetest I/OpenGLRenderer: Initialized EGL, version 1.4
02-25 13:54:23.102 3297-3317/com.gerpeace.databasetest D/OpenGLRenderer: Enabling debug mode 0
02-25 13:54:23.180 3297-3317/com.gerpeace.databasetest V/RenderScript: 0xa3f02c00 Launching thread(s), CPUs 2

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您应该将代码简化为一个较小的示例。你不能指望我们读那么多代码。请看一看很抱歉这么长的代码…我只是不知道哪里出错了。但是，我已经剪切了一些代码，我认为这不是问题。非常感谢您的建议。问题与开始该活动有关；所有其他代码都不重要。您能建议如何修复它吗？