小编Bar*_*per的帖子

我是Android的新手,我开始按照教程等方式制作我的第一个应用程序.但是,当我单击运行按钮时,它会在logcat上给出以下错误,我从中计算出错误的位置.因此,这是我的代码,希望有一些建议.提前致谢.

public class MainActivity extends AppCompatActivity {

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

        Button btn = (Button) findViewById(R.id.btn);
        btn.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                EditText firstnum = (EditText) findViewById(R.id.numberinput);
                TextView resultTextView = (TextView) findViewById(R.id.resulttextview);
                int num1 = Integer.parseInt(firstnum.getText().toString()) ;
                int result = num1 * num1;
                resultTextView.setText(result + "");
            }
        });
    }
}

修复渲染问题后的LogCat:

7-16 01:27:14.359 10870-10870/com.example.abarimess.myfirstapp E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.abarimess.myfirstapp, PID: 10870
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.abarimess.myfirstapp/com.example.abarimess.myfirstapp.MainActivity}: java.lang.UnsupportedOperationException: Can't convert to dimension: …