如何在Samsung Galaxy Tab上使用相机闪光灯/ LED作为手电筒？
我正面临三星Galaxy Tab的问题。我想用相机闪光灯作为火炬。
有谁知道如何启用它？
因此，一个代码可用于启用/禁用HTC Desire上的相机闪光灯，但在三星Galaxy Tab上失败。
FlashLight.java：
package com.example.FlashLight;
import android.app.Activity;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class FlashLight extends Activity {
private final static String LOG_TAG = "FlashLight";
private Button mOnBtn;
private Button mOffBtn;
private Camera mCamera;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mOnBtn = (Button) findViewById(R.id.on_btn);
mOnBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
processOnClick();
}
});
mOffBtn = (Button) findViewById(R.id.off_btn);
mOffBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
processOffClick();
}
});
}
@Override
protected void onResume() {
super.onResume();
try{
mCamera = Camera.open();
} catch( Exception e ){
Log.e(LOG_TAG, "Impossible d'ouvrir la camera");
}
}
@Override
protected void onPause() {
if( mCamera != null ){
mCamera.release();
mCamera = null;
}
super.onPause();
}
private void processOffClick(){
if( mCamera != null ){
Parameters params = mCamera.getParameters();
params.setFlashMode( Parameters.FLASH_MODE_OFF );
mCamera.setParameters( params );
}
}
private void processOnClick(){
if( mCamera != null ){
Parameters params = mCamera.getParameters();
params.setFlashMode( Parameters.FLASH_MODE_TORCH );
mCamera.setParameters( params );
}
}
}
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".FlashLight"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
</manifest>
<?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"
>
<Button
android:id="@+id/on_btn"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Flash ON" />
<Button
android:id="@+id/off_btn"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Flash OFF" />
</LinearLayout>
没有找到相关结果
已邀请:
4 个回复
诧不达
芯伶句餐绕
。 完成后，在设置参数后，执行。这应该够了吧。冕偷淮款
if (Build.MODEL.equals("GT-P1000")) { Log.d(FlashlightActivity.TAG, "This is Samsung Galaxy Tab."); params.setFlashMode(Parameters.FLASH_MODE_ON); camera.setParameters(params); camera.startPreview(); camera.autoFocus(new AutoFocusCallback() { public void onAutoFocus(boolean success, Camera camera) { } }); isLEDturnedOn = true; Log.d(FlashlightActivity.TAG, "LED turned ON."); }钾涎净介
public void changeTorch() { try { camera = Camera.open(); // try to open the camera to turn on the torch Camera.Parameters param = camera.getParameters(); param.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH); camera.setParameters(param); camera.startPreview(); // needed for some devices Log.v("BSW torch", "Torch ON"); } catch (Exception e) { // if open camera fails, try to release camera Log.w("BSW torch", "Camera is being used trying to turn Torch OFF"); try { camera.release(); } catch (Exception ex) { Log.e("BSF torch", "Error releasing camera"); } } }