Android调用相机接口


android 中调用照相功能有两种方法

一种是调用系统自带的camera：能够用Intent直接开启

另一种是利用SurfaceView：能够添加自己想要的功能

下面是代码：

方法一

package cn.mydreamy.zhao.photo;

import java.io.File;

import android.app.Activity;

import android.content.Intent;

import android.net.Uri;

import android.os.Bundle;

import android.os.Environment;

import android.provider.MediaStore;

import android.util.Log;

public class Photograph_I extends Activity {

/** Called when the activity is first created.*/

private String logTag = "Exception";

@Override
public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

// setContentView(R.layout.main);

try {

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

File out = new File(Environment.getExternalStorageDirectory(),
"camera.jpg");

Uri uri = Uri.fromFile(out);

intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);

startActivityForResult(intent, 0);

} catch (Exception e) {

e.printStackTrace();

}

}

protected void onActivityResult(int requestCode, int resultCode, Intent data)

{

try {

Log.v("", "requestCode = " + requestCode + " resultCode = "
+ resultCode);

if (requestCode != 0) {

return;

}

if (resultCode == 0) {

finish();

return;

}

// Bundle extras = data.getExtras();

// Bitmap b = (Bitmap) extras.get("data");

Intent intent = new Intent();

intent.setClass(this, ShowImageActivity.class);

// intent.putExtra("image",b);

this.startActivity(intent);

} catch (Exception e) {

// TODO: handle exception

Log.v(logTag, e.getMessage());

}

}

}

另一个类

package cn.mydreamy.zhao.photo;

import cn.mydreamy.zhao.photo.R;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.MotionEvent;
import android.widget.ImageView;

public class ShowImageActivity extends Activity {
private String logTag = "exception";
private AlertDialog alertDialog;
private ImageView view;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.show);
try {
view = (ImageView) findViewById(R.id.view);
// Bundle bundle = this.getIntent().getExtras();
// Bitmap b = bundle.getParcelable("image");
String pathString = Environment.getExternalStorageDirectory()
.toString()
+ "/camera.jpg";
Log.v("", "pathString = " + pathString);
Bitmap b = BitmapFactory.decodeFile(pathString);
view.setImageBitmap(b);
// setContentView(view);
alertDialog = new AlertDialog.Builder(ShowImageActivity.this)
.setMessage("Feels Like IS感觉就像IS尽量晃动手机，体验IS的无限动感。")
.setPositiveButton("ok",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
/* User clicked OK so do some stuff */
}
}).setNegativeButton("cancle",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
/* User clicked Cancel so do some stuff */
}
}).create();
alertDialog.show();
} catch (Exception e) {
Log.v(logTag, e.getMessage());
throw new RuntimeException(e);

}
}

@Override
public boolean onTouchEvent(MotionEvent event) {
// TODO Auto-generated method stub
Log.v("", "event = " + event.getX());
return super.onTouchEvent(event);
}

}
show.xml:

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

方法2：

package cn.mydreamy.zhao.photo;

import java.io.IOException;


import cn.mydreamy.zhao.photo.R;

import android.app.Activity;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.hardware.Camera.AutoFocusCallback;
import android.hardware.Camera.Parameters;
import android.hardware.Camera.PictureCallback;
import android.hardware.Camera.ShutterCallback;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.view.SurfaceHolder.Callback;
import android.view.View.OnClickListener;
import android.widget.ImageView;

public class Photograph_S extends Activity implements Callback, OnClickListener {
/** Called when the activity is first created.*/
private SurfaceView mSurfaceView;
private SurfaceHolder mSurfaceHolder;
private Camera mCamera;
private boolean mPreviewRunning;
private ImageView mImageView;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFormat(PixelFormat.TRANSLUCENT);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
setContentView(R.layout.main);
mSurfaceView = (SurfaceView) findViewById(R.id.camera);
mImageView = (ImageView) findViewById(R.id.image);
mImageView.setVisibility(View.GONE);
mSurfaceView.setOnClickListener(this);
mSurfaceHolder = mSurfaceView.getHolder();
mSurfaceHolder.addCallback(this);
mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
if (mPreviewRunning) {
mCamera.stopPreview();
}
Parameters params = mCamera.getParameters();
params.setPictureFormat(PixelFormat.JPEG);// 设置图片格式

// params.setPreviewSize(width, height);
params.set("rotation", 90);
mCamera.setParameters(params);
try {
mCamera.setPreviewDisplay(holder);
} catch (IOException e) {
e.printStackTrace();
}
mCamera.startPreview();
mPreviewRunning = true;
}

private AutoFocusCallback mAutoFocusCallBack = new AutoFocusCallback() {

@Override
public void onAutoFocus(boolean success, Camera camera) {

Log.v("AutoFocusCallback", "AutoFocusCallback" + success);
Camera.Parameters Parameters = mCamera.getParameters();
Parameters.setPictureFormat(PixelFormat.JPEG);// 设置图片格式
mCamera.setParameters(Parameters);
mCamera.takePicture(mShutterCallback, null, mPictureCallback);
}
};

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

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

/**
* 拍照的回调接口
*/
PictureCallback mPictureCallback = new PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
Log.v("PictureCallback", "…onPictureTaken…");
if (data != null) {
Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0,
data.length);
mImageView.setImageBitmap(bitmap);
mImageView.setVisibility(View.VISIBLE);
mSurfaceView.setVisibility(View.GONE);
if (mPreviewRunning) {
mCamera.stopPreview();
mPreviewRunning = false;
}
}
}
};
/**
* 在相机快门关闭时候的回调接口，通过这个接口来通知用户快门关闭的事件，
* 普通相机在快门关闭的时候都会发出响声，根据需要可以在该回调接口中定义各种动作， 例如：使设备震动
*/
ShutterCallback mShutterCallback = new ShutterCallback() {

public void onShutter() {
// just log ,do nothing
Log.v("ShutterCallback", "…onShutter…");
}

};

public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) {
if (mCamera != null) {
// mCamera.takePicture(null, null,mPictureCallback);
mCamera.autoFocus(mAutoFocusCallBack);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR);
}
}
return super.onKeyDown(keyCode, event);
}

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Log.v("onClick", "…onClick…");
mCamera.autoFocus(mAutoFocusCallBack);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {

menu.add(0, 1, 0, "调用系统照相机");
return true;
}

@Override
public boolean onMenuItemSelected(int featureId, MenuItem item) {
// TODO Auto-generated method stub
switch(item.getItemId()){
case 1:
Intent intent = new Intent();
intent.setClass(Photograph_S.this, Photograph_I.class);
startActivity(intent);
break;
}
return true;
}
}
main.xml:

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

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