安卓应用开发我的app闪退怎么回事啊，闪到界面都出不来啊！大神们救救孩子吧！！！！！！！！！！！！public class MainActivity extends AppCompatActivity { private EditText mEditText; private TextView mTextView; private Button mButton; private ImageView mImageView; private View backgroundColor; private double rate =39.37; private int [] colors = {Color.BLACK,Color.BLUE,Color.RED,Color.GRAY,Color.GREEN,Color.WHITE}; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mEditText=(EditText) findViewById(R.id.meterEditText); mTextView=(TextView) findViewById(R.id.resultTextView); mImageView=(ImageView) findViewById(R.id.changeColorImageView); backgroundColor=findViewById(R.id.backgroundColor); mButton=(Button) findViewById(R.id.converBtn); mButton.setOnClickListener((v)->{ double meters=0.0; double result =0.0;