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EditText上的setText無法正常工作

[英]setText on EditText is not working properly

將正確的內容放入EditText(在此應用程序中為“陀螺”)時,我遇到一些問題。 我試圖在手機上顯示陀螺儀的值,直到可以在控制台中成功打印出。

當我使用gyro.setText(string)時,問題就開始了,它什么也沒做。 我唯一看到的是0.0、0.0、0.0,而我在控制台中得到了正確的數字。 會覆蓋當前值嗎?或者我在這里遺漏了什么?

@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);

        }
    }

嘗試使用:

        tvX.setText(String.ValueOf(deltaX));
        tvY.setText(String.ValueOf(deltaY));
        tvZ.setText(String.ValueOf(deltaZ));

嘗試這個..

你可以用兩種方式做到這一點

tvX.setText(""+deltaX);
tvY.setText(""+deltaY);
tvZ.setText(""+deltaZ);

要么

tvX.setText(String.ValueOf(deltaX));
tvY.setText(String.ValueOf(deltaY));
tvZ.setText(String.ValueOf(deltaZ));

文檔說EditText有一個setText()方法,它需要2個參數:

setText(CharSequence text, TextView.BufferType type)

設置此TextView要顯示的文本(請參見setText(CharSequence)),還設置是否將其存儲在可樣式化/可擴展的緩沖區中以及是否可編輯。

(TextView.BufferType文檔在這里

因此,在您的代碼中,您正在執行以下操作:

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); 

嘗試通過以下方式設置文本:

gyro.setText(latestDeltaRotationVector, TextView.BufferType.EDITABLE); 

要么

gyro.setText(latestDeltaRotationVector, TextView.BufferType.NORMAL);

另外,在您的onCreate()方法中,您是否要設置內容視圖?

setContentView(R.layout.YOUR_LAYOUT_NAME_WITH_editText1);

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