Android 相机预览不'；不启动，不启动'；没有显示任何错误

我正在尝试开发一个相机活动，但当我开始活动时，相机预览没有开始。
它只显示按钮层，logcat不显示任何错误

在安卓4.1.1的10英寸平板电脑中，该活动正常运行

在装有安卓4.0.4的海信4“中，活动不起作用（不启动相机预览）

有人能帮我吗

这是活动中的代码

package com.asde.app;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.BitmapFactory;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.hardware.Camera.PictureCallback;
import android.hardware.Camera.ShutterCallback;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore.Images;
import android.view.LayoutInflater;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.ImageView;
import android.widget.Toast;
import android.widget.ZoomControls;

public class CameraHandler extends Activity implements SurfaceHolder.Callback {

    private LayoutInflater myInflater = null;
    Camera myCamera;
    byte[] tempdata;
    boolean myPreviewRunning = false;
    private SurfaceHolder mySurfaceHolder;
    private SurfaceView mySurfaceView;
    ImageView takePicture;
    private int contador = 0;
    int currentZoomLevel = 0, maxZoomLevel = 0;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        getWindow().setFormat(PixelFormat.TRANSLUCENT);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

        setContentView(R.layout.activity_campreview);

        mySurfaceView = (SurfaceView) findViewById(R.id.surface);
        mySurfaceHolder = mySurfaceView.getHolder();
        mySurfaceHolder.addCallback(this);
        if(Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB)
            mySurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);



        myInflater = LayoutInflater.from(this);
        View overView = myInflater.inflate(R.layout.layer_camerahandler,null);
        this.addContentView(overView, new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT));


        takePicture = (ImageView) findViewById(R.id.shutter);
        takePicture.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                myCamera.takePicture(myShutterCallback, myPictureCallback, myJpeg);
            }
        });

        ImageView patient = (ImageView) findViewById(R.id.patient);
        patient.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(CameraHandler.this, WelcomeActivity.class);  
                startActivity(intent);
                finish();
            }
        });



    }

    //Evento post toma foto. (sonidos etc)
    ShutterCallback myShutterCallback = new ShutterCallback() {
        @Override
        public void onShutter() {
        }
    };

    PictureCallback myPictureCallback = new PictureCallback() {
        @Override
        public void onPictureTaken(byte[] data, Camera myCamera) {
            // TODO Auto-generated method stub
        }
    };

    PictureCallback myJpeg = new PictureCallback() {
        @Override
        public void onPictureTaken(byte[] data, Camera myCamera) {
            // TODO Auto-generated method stub
            if(data != null){
                tempdata = data;
                done();
            }
        }
    };


    void done(){

        contador++;
        // Creo carpeta destino
        File folders = new File(Environment.getExternalStorageDirectory()
                + "/GASDE/Telemedicina/data/");
        folders.mkdirs();
        // Defino nombre archivo descarga
        File file;
        file = new File(Environment.getExternalStorageDirectory()
                + "/GASDE/Telemedicina/data/"+contador+".jpg");

        // Compruebo existencia archivo
        if (!file.exists()) {
            try {
                file.createNewFile();
            } catch (IOException e) {
                e.printStackTrace();
            }
        } else {
            file.delete();
            try {
                file.createNewFile();
            } catch (IOException e) {               
                e.printStackTrace();
            }
        }


        Bitmap bmp = BitmapFactory.decodeByteArray(tempdata, 0, tempdata.length);

        try {
               FileOutputStream out = new FileOutputStream(file);
               bmp.compress(Bitmap.CompressFormat.JPEG, 100, out);
               out.close();
               bmp.recycle();
               Toast.makeText(this, "creada", Toast.LENGTH_SHORT).show();
               myCamera.startPreview();
                System.out.println("2-" + myCamera.getParameters().getFocusMode());

        } catch (Exception e) {
               e.printStackTrace();
        }
    }

    //metodos de control del objeto camara

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
        // TODO Auto-generated method stub
        try{
            if(myPreviewRunning){               
                myCamera.stopPreview();
                myPreviewRunning = false;
            }
            Camera.Parameters p = myCamera.getParameters();
            p.setPreviewSize(width,height);

            myCamera.setParameters(p);
            myCamera.setPreviewDisplay(holder);
            myCamera.startPreview();
            System.out.println("1-" + myCamera.getParameters().getFocusMode());
            myPreviewRunning = true;
        }catch(Exception e){}
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        // TODO Auto-generated method stub
            myCamera = Camera.open();

        }

        @Override
        public void surfaceDestroyed(SurfaceHolder holder) {
            // TODO Auto-generated method stub
            //myCamera.cancelAutoFocus();
            myCamera.stopPreview();
            myPreviewRunning = false;
            myCamera.release();
            myCamera = null;
        }

    }

package com.asde.app；
导入java.io.File；
导入java.io.FileNotFoundException；
导入java.io.FileOutputStream；
导入java.io.IOException；
导入java.io.OutputStream；
导入android.app.Activity；
导入android.content.Intent；
导入android.graphics.Bitmap；
导入android.graphics.Bitmap.CompressFormat；
导入android.graphics.BitmapFactory；
导入android.graphics.PixelFormat；
导入android.hardware.Camera；
导入android.hardware.Camera.PictureCallback；
导入android.hardware.Camera.ShutterCallback；
导入android.os.Build；
导入android.os.Bundle；
导入android.os.Environment；
导入android.provider.MediaStore.Images；
导入android.view.LayoutInflater；
导入android.view.SurfaceHolder；
导入android.view.SurfaceView；
导入android.view.view；
导入android.view.Window；
导入android.view.WindowManager；
导入android.view.view.OnClickListener；
导入android.view.ViewGroup.LayoutParams；
导入android.widget.ImageView；
导入android.widget.Toast；
导入android.widget.ZoomControls；
公共类CameraHandler扩展活动实现SurfaceHolder.Callback{
私用充气机myInflater=null；
照相机我的照相机；
字节[]临时数据；
布尔myPreviewRunning=false；
私人表面持有人；
私人SurfaceView mySurfaceView；
图像视图拍摄；
私有int contador=0；
int currentZoomLevel=0，maxZoomLevel=0；
@凌驾
创建时的公共void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
getWindow（）.setFormat（像素格式.半透明）；
requestWindowFeature（窗口。功能\u无\u标题）；
getWindow（）.setFlags（WindowManager.LayoutParams.FLAG_全屏，WindowManager.LayoutParams.FLAG_全屏）；
setContentView（R.layout.activity_campreview）；
mySurfaceView=（SurfaceView）findViewById（R.id.surface）；
mySurfaceHolder=mySurfaceView.getHolder（）；
mySurfaceHolder.addCallback（this）；
if（Build.VERSION.SDK\u INT<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     android:orientation = "vertical"
     android:gravity = "right|center_vertical"
     android:layout_gravity = "right|center_vertical">

               <LinearLayout

          android:layout_width = "match_parent"
          android:layout_height = "wrap_content"
          android:orientation = "horizontal"
          android:layout_marginBottom="10dp"
          android:layout_marginLeft="10dp"
          android:layout_weight="1"
          android:gravity = "right|bottom">
          <ImageView
               android:id="@+id/zoomout"
               android:layout_width = "wrap_content"
               android:layout_height = "wrap_content"
               android:layout_marginRight="10dp"
               android:src="@drawable/zoomout">
          </ImageView>
           <ImageView
               android:id="@+id/zoomin"
               android:layout_width = "wrap_content"
               android:layout_height = "wrap_content"
               android:layout_marginRight="10dp"
               android:src="@drawable/zoomin">
          </ImageView>

     </LinearLayout>


     <LinearLayout

          android:layout_width = "match_parent"
          android:layout_height = "wrap_content"
          android:orientation = "horizontal"
          android:layout_weight="10"
          android:gravity = "right|center_vertical">

          <ImageView
               android:id="@+id/shutter"
               android:layout_width = "wrap_content"               
               android:layout_marginRight="8dp"
               android:layout_height = "wrap_content"
               android:src="@drawable/shutter">
          </ImageView>
     </LinearLayout>

          <LinearLayout

          android:layout_width = "match_parent"
          android:layout_height = "wrap_content"
          android:orientation = "horizontal"
          android:layout_marginBottom="10dp"
          android:layout_marginLeft="10dp"
          android:layout_weight="1"
          android:gravity = "left|bottom">
          <ImageView
               android:id="@+id/patient"
               android:layout_width = "wrap_content"
               android:layout_height = "wrap_content"
               android:src="@drawable/gallery">
          </ImageView>

     </LinearLayout>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:orientation="vertical"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent">
     <SurfaceView
          android:id = "@+id/surface"
          android:layout_width = "fill_parent"
          android:layout_height = "fill_parent">
     </SurfaceView>
</LinearLayout>