Android-RuntimeException,哪里出问题了？

概述在这个程序中,我有3个按钮和1个textView.在当前阶段,我基本上将很多事情留空了.例如我尚未实现按钮功能.但是现在里面有一个运行时错误.甚至元素也无法显示出来.能否请你帮忙？importandroid.hardware.Sensor;importandroid.hardware.SensorEvent;importandroid.hardware.S

在这个程序中,我有3个按钮和1个textVIEw.
在当前阶段,我基本上将很多事情留空了.
例如我尚未实现按钮功能.

但是现在里面有一个运行时错误.
甚至元素也无法显示出来.

能否请你帮忙？

import androID.harDWare.Sensor;import androID.harDWare.SensorEvent;import androID.harDWare.SensorEventListener;import androID.harDWare.SensorManager;import androID.os.Bundle;import androID.app.Activity;import androID.vIEw.Menu;import androID.vIEw.VIEw;import androID.vIEw.VIEw.OnClickListener;import androID.Widget.button;import androID.Widget.TextVIEw;public class MainActivity extends Activity implements SensorEventListener {    button startbutton;    button pausebutton;    button resetbutton;    TextVIEw textVIEw = (TextVIEw) findVIEwByID(R.ID.textVIEw1);    private SensorManager sensorManager;    private long lastUpdate;    private boolean isCalibrated = false;    private int referrenceAxis;    private int stepCounts = 0;    @OverrIDe    protected voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentVIEw(R.layout.activity_main);        // start button        startbutton = (button) findVIEwByID(R.ID.button1);        startbutton.setonClickListener(new OnClickListener() {            public voID onClick(VIEw v) {            }        });        // pause button        pausebutton = (button) findVIEwByID(R.ID.button2);        pausebutton.setonClickListener(new OnClickListener() {            public voID onClick(VIEw v) {            }        });        // reset button        resetbutton = (button) findVIEwByID(R.ID.button3);        resetbutton.setonClickListener(new OnClickListener() {            public voID onClick(VIEw v) {            }        });        init();    }    @OverrIDe    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.main, menu);        return true;    }    public voID init() {        sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);        lastUpdate = System.currentTimeMillis();    }    public voID onSensorChanged(SensorEvent event) {        if (event.sensor.getType() == Sensor.TYPE_liNEAR_acceleration) {            long actualTime = System.currentTimeMillis();            if (isCalibrated && (actualTime - lastUpdate > 500)) {                if (event.values[referrenceAxis] > 1) {                    stepCounts++;                }            }        }        if (event.sensor.getType() == Sensor.TYPE_GraviTY) {            if (!isCalibrated) {                if ((event.values[0] >= event.values[1])&&(event.values[0] >= event.values[2]))                    referrenceAxis = 0;                if ((event.values[1] >= event.values[0])&&(event.values[1] >= event.values[2]))                    referrenceAxis = 1;                if ((event.values[2] >= event.values[0])&&(event.values[2] >= event.values[1]))                    referrenceAxis = 2;                isCalibrated = true;            }        }    }    public voID onAccuracyChanged(Sensor sensor, int accuracy) {    }    protected voID onResume() {        super.onResume();        // register this class as a Listener for the sensors        sensorManager                .registerListener(this, sensorManager                        .getDefaultSensor(Sensor.TYPE_liNEAR_acceleration),                        SensorManager.SENSOR_DELAY_norMAL);        sensorManager.registerListener(this,                sensorManager.getDefaultSensor(Sensor.TYPE_GraviTY),                SensorManager.SENSOR_DELAY_norMAL);    }    protected voID onPause() {        // unregister Listener        super.onPause();        sensorManager.unregisterListener(this);    }}

解决方法:

采用

TextVIEw textVIEw = (TextVIEw) findVIEwByID(R.ID.textVIEw1);

后

    setContentVIEw(R.layout.activity_main);

膨胀父级布局之前,不能膨胀子视图.因此,在您的情况下,将textVIEw声明为成员变量,然后在setContentVIEw之后对其进行初始化.所以你的实现就像

作为成员变量声明

TextVIEw textVIEw;

在onCreate中

setContentVIEw(R.layout.activity_main);TextVIEw textVIEw = (TextVIEw) findVIEwByID(R.ID.textVIEw1); 

总结

以上是内存溢出为你收集整理的Android-RuntimeException,哪里出问题了？全部内容，希望文章能够帮你解决Android-RuntimeException,哪里出问题了？所遇到的程序开发问题。

如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。