前言:在最近的工作中涉及到从u盘拷贝大量数据到车机,偶尔有失效的情况,后面发现是sdcard存储空间不足,因此想在代码中展示出当前系统分区.查看系统分区在adb中为adb shell df

我们用如下方法可执行任意的adb shell命令,在此仅用"df"举例

• 代码如下

private String[] doRuntimeCmmd(String command) {        Log.d(TAG, "doRuntimeCmmd:" + command);        Process process = null;        BufferedReader mOutReader = null;        BufferedReader mErrorReader = null;       try {            process = Runtime.getRuntime().exec(command);            Log.d(TAG, "process exec: " + process);                        mOutReader = new BufferedReader(new InputStreamReader(process.getInputStream()));            int mOutread;       char[] outBuffer = new char[4096];            StringBuffer output = new StringBuffer();            while ((mOutread = mOutReader.read(outBuffer)) > 0) {                output.append(outBuffer, 0, mOutread);            }               mErrorReader = new BufferedReader(new InputStreamReader(process.getErrorStream()));            int mErrorread;            char[] errorBuffer = new char[4096];            StringBuffer error = new StringBuffer();              while ((mErrorread = mErrorReader.read(errorBuffer)) > 0) {                error.append(errorBuffer, 0, mErrorread);            }                        process.waitFor();          String[] mResult = { output.toString(), error.toString() };            Log.d(TAG, command +" Result:" + mResult[0]);            Log.d(TAG, command+ " Error:" + mResult[1]);            return mResult;              } catch (Exception e) {            e.printStackTrace();            String[] mResult = { "error", "error" };            Log.d(TAG, command + "  Result = " + mResult[0] + "   Error = " + mResult[1]);            return mResult;     } finally {            try {                if (mOutReader != null) {                    mOutReader.close();                }          if (mErrorReader != null) {                    mErrorReader.close();                }            if (process != null) {                    Log.d(TAG, "process destroy: " + process);                    process.destroy();                }         } catch (IOException e) {                e.printStackTrace();            }                }    }

我们在代码中按如下使用

String[] runtimeCmmd = doRuntimeCmmd("df");MySortViewOfCMD textView = new MySortViewOfCMD(getActivity());textView.setCurrentString(runtimeCmmd[0]);

用此方法得到的文本结果,并不像adb命令行中格式化的,需要自定义控件

• 自定义view实现排版仅供参考

public class MySortViewOfCMD extends TextView {    private String text;    int lineCount = 0;    private Paint paint = new Paint();    private ArrayMap
     
       charByMap;    private int mWidth = 900;// px    private int mHeight = 660;    private Scroller mScroller;    private int lastPointX;    private int lastPointY;    public MySortViewOfCMD(Context context) {        super(context);        initPaint(context);    }    public MySortViewOfCMD(Context context, AttributeSet attrs) {        super(context, attrs);        initPaint(context);    }    private void initPaint(Context context) {        paint.setColor(context.getResources().getColor(R.color.white));        paint.setTextSize(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,                18, context.getResources().getDisplayMetrics()));        mScroller = new Scroller(context);    }    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        super.onMeasure(widthMeasureSpec, heightMeasureSpec);        int width = measureDimension(mWidth, widthMeasureSpec);        int height = measureDimension(mHeight, heightMeasureSpec);        setMeasuredDimension(width, height);    }    private int measureDimension(int defaultSize, int measureSpec) {        int result = defaultSize;        int specMode = MeasureSpec.getMode(measureSpec);        int specSize = MeasureSpec.getSize(measureSpec);        if (specMode == MeasureSpec.EXACTLY) {            result = specSize;        } else if (specMode == MeasureSpec.AT_MOST) {            result = Math.min(defaultSize, specSize);        } else {        result = defaultSize;        }        return result;    }    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);        for (int i = 0; i < charByMap.size(); i++) {//绘制行        String[] strings = charByMap.get(i);            for (int j = 0; j < strings.length; j++) {//绘制列                if (j == 1) {//针对第二列做特殊处理,防止与第一列重影                    canvas.drawText(strings[j], j * (mWidth / 3) + 60,                            i * 30 + 25, paint);                continue;                }                canvas.drawText(strings[j], j * (mWidth / 3), i * 30 + 25,                        paint);            }        }        }    @Override    public boolean onTouchEvent(MotionEvent event) {    switch (event.getAction()) {        case MotionEvent.ACTION_DOWN:            lastPointX = (int) event.getX();            lastPointY = (int) event.getY();            return true;    case MotionEvent.ACTION_MOVE:                        int mXMove = (int) event.getX();             int scrolledX = (int) (lastPointX - mXMove);     if(getScrollX() + scrolledX < 0){//左边界                 scrollTo(0, 0);                 return true;             }        if (getScrollX() + getWidth() + scrolledX < (mWidth / 3) * 5)//小于右边界                mScroller.startScroll(getScrollX(), 0,                        lastPointX - (int) event.getX(), 0, 200);            invalidate();            break;    case MotionEvent.ACTION_UP:            break;        }        return true;    }    /**     * 平滑滚动             */    @Override    public void computeScroll() {        if (mScroller.computeScrollOffset()) {            scrollTo(mScroller.getCurrX(), mScroller.getCurrY());            invalidate();        }    }        public void setCurrentString(String text) {        this.text = text;        charByMap = saveCharByMap(text);        invalidate();    }    /**     * 根据传进来的string保存每一行的字符     *      * @param string     *            -显示的字符串 eg: file size use \n filedddd size use \n     */     private ArrayMap
      
        saveCharByMap(String string) {        String[] lineString = string.split("\n");        ArrayMap
       
         charMap = new ArrayMap
        
         ();        lineCount = lineString.length;    for (int i = 0; i < lineCount; i++) {            String[] charItem = lineString[i].split("\\s+");// 按空格切出字符            charMap.put(i, charItem);        }            return charMap;    }}
        
       
      
     

感谢android,感谢开源