Android 后台截图

系统是Android 2.3以上：

adb shell screencap -p xxx.png

系统是Android 4.0以上：

adb shell screenshot xxx.png

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但有时候要看系统编译时有那个命定，我们产品系统是4.4和6.0，但只有screencap
查看有那个名单
1. adb shell
2. cd system/bin
3. ls
4. 查看screen开头有那个

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 String fileName = fileDir + time + ".png";
        String[] args = {"screencap", "-p", fileName};
        ProcessBuilder processBuilder = new ProcessBuilder(args);
        Process process = null;
        BufferedReader successResult = null;
        BufferedReader errorResult = null;
        StringBuilder successMsg = new StringBuilder();
        StringBuilder errorMsg = new StringBuilder();
 try {
            process = processBuilder.start();
            successResult = new BufferedReader(new InputStreamReader(process.getInputStream()));
            errorResult = new BufferedReader(new InputStreamReader(process.getErrorStream()));
            String s;
            while ((s = successResult.readLine()) != null) {
                successMsg.append(s);
            }
            while ((s = errorResult.readLine()) != null) {
                errorMsg.append(s);
            }
        } catch (IOException e) {
            e.printStackTrace();
 } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (successResult != null) {
                    successResult.close();
                }
                if (errorResult != null) {
                    errorResult.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
            if (process != null) {
                process.destroy();
            }
        }

添加权限

uses-permission android:name=”android.permission.READ_FRAME_BUFFER”

清单文件设置为

android:sharedUserId=”android.uid.system”