MVVM遇到的坑

home 键防止重启

if (!this.isTaskRoot()) {

Intent mainIntent = getIntent();

    String action = mainIntent.getAction();

    if (mainIntent.hasCategory(Intent.CATEGORY_LAUNCHER) && action.equals(Intent.ACTION_MAIN)) {

finish();

return;

    }

}

Android Butterknife

https://github.com/JakeWharton/butterknife

开启蓝牙

Intent turn_on = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); startActivityForResult(turn_on, 0); if(bluetoothAdapter.enable()) { Toast.makeText(MainActivity.this, "蓝牙已经开启", Toast.LENGTH_SHORT).show(); } else { Toast.makeText(MainActivity.this, "蓝牙开启失败", Toast.LENGTH_SHORT).show(); }

BluetoothGatt通信用的

https://www.jianshu.com/p/a406b94f3188

如何在非activity使用startActivity

public class LoginPwNewextends AppCompatActivity {

public static LoginPwNewloginPwNew;

    public static ContextmContext;

    @Override

    protected void onCreate(@Nullable Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

        ActivityLoginMobile1Binding binding = DataBindingUtil.setContentView(this, R.layout.activity_login_mobile1);

        binding.setLogMb(new LogMbViewModel());

        loginPwNew=this;

        mContext=this.getBaseContext();

    }

}

然后再类中

try {

Intent intent =new Intent(LoginPwNew.loginPwNew, TvMainActivity.class);

    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);

    LoginPwNew.loginPwNew.startActivity(intent);

    finish();

}catch (Exception e) {

e.printStackTrace();

}