将正确的内容放入EditText（在此应用程序中为“陀螺仪”）时，我遇到一些问题。我试图在手机上显示陀螺仪的值，直到可以在控制台中成功打印出。
当我使用gyro.setText（string）时，问题就开始了，它什么也没做。我唯一看到的是0.0、0.0、0.0，而我在控制台中得到了正确的数字。某些内容会覆盖当前值吗？还是我在这里遗漏了一些内容？
@Override
public void onSensorChanged(SensorEvent event) {
EditText gyro = (EditText)findViewById(R.id.editText1);
float x = event.values[0];
float y = event.values[1];
float z = event.values[2];
if (!mInitialized) {
mLastX = x;
mLastY = y;
mLastZ = z;
tvX.setText("0.0");
tvY.setText("0.0");
tvZ.setText("0.0");
gyro.setText("nog niet gestart");
mInitialized = true;
} else {
float deltaX = Math.abs(mLastX - x);
float deltaY = Math.abs(mLastY - y);
float deltaZ = Math.abs(mLastZ - z);
if (deltaX < NOISE) deltaX = (float)0.0;
if (deltaY < NOISE) deltaY = (float)0.0;
if (deltaZ < NOISE) deltaZ = (float)0.0;
mLastX = x;
mLastY = y;
mLastZ = z;
tvX.setText(Float.toString(deltaX));
tvY.setText(Float.toString(deltaY));
tvZ.setText(Float.toString(deltaZ));
iv.setVisibility(View.VISIBLE);
if (deltaX > deltaY) {
iv.setImageResource(R.drawable.horizontal);
} else if (deltaY > deltaX) {
iv.setImageResource(R.drawable.vertical);
} else {
iv.setVisibility(View.INVISIBLE);
}
if (timestamp != 0) {
final float dT = (event.timestamp - timestamp) * NS2S;
// Axis of the rotation sample, not normalized yet.
float axisX = event.values[0];
float axisY = event.values[1];
float axisZ = event.values[2];
if (omegaMagnitude > EPSILON) {
axisX /= omegaMagnitude;
axisY /= omegaMagnitude;
axisZ /= omegaMagnitude;
}
float thetaOverTwo = omegaMagnitude * dT / 2.0f;
float sinThetaOverTwo = (float) Math.sin(thetaOverTwo);
float cosThetaOverTwo = (float) Math.cos(thetaOverTwo);
deltaRotationVector[0] = sinThetaOverTwo * axisX;
deltaRotationVector[1] = sinThetaOverTwo * axisY;
deltaRotationVector[2] = sinThetaOverTwo * axisZ;
deltaRotationVector[3] = cosThetaOverTwo;
String latestDeltaRotationVector = Double.toString(deltaRotationVector[0]*0.000277777778)+", "+Double.toString(deltaRotationVector[1]*0.000277777778)+", "+Double.toString(deltaRotationVector[2]*0.000277777778)+", ";
System.out.println(latestDeltaRotationVector);
gyro.setText(latestDeltaRotationVector);
}
timestamp = event.timestamp;
float[] deltaRotationMatrix = new float[9];
SensorManager.getRotationMatrixFromVector(deltaRotationMatrix, deltaRotationVector);
}
}
最佳答案
docs说EditText有一个setText（）方法，它需要2个参数：
setText(CharSequence text, TextView.BufferType type)
设置此TextView要显示的文本（请参见setText（CharSequence）），还设置是否将其存储在可样式化/可扩展的缓冲区中，以及是否可编辑。
（TextView.BufferType文档here）
因此，在您的代码中，您正在执行以下操作：
String latestDeltaRotationVector = Double.toString(deltaRotationVector[0]*0.000277777778)+", "+Double.toString(deltaRotationVector[1]*0.000277777778)+", "+Double.toString(deltaRotationVector[2]*0.000277777778)+", ";
System.out.println(latestDeltaRotationVector);
gyro.setText(latestDeltaRotationVector);
尝试通过以下方式设置文本：
gyro.setText(latestDeltaRotationVector, TextView.BufferType.EDITABLE);
要么
gyro.setText(latestDeltaRotationVector, TextView.BufferType.NORMAL);
另外，在您的onCreate（）方法中，您是否要设置内容视图？
setContentView(R.layout.YOUR_LAYOUT_NAME_WITH_editText1);