Android实现闪光灯效果

<uses-permission android:name="android.permission.CAMERA"/ 
<uses-permission android:name="android.permission.FLASHLIGHT" / 

package com.google.yang.myapplication;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
/**
* 闪光灯的控制
*
* @author yang
*/
public class MainActivity extends AppCompatActivity {
private Button open;
private Button close;
private Button openFlicker;
private Button closeFlicker;
private Camera camera;
private Boolean isShanshuo;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
open = (Button) this.findViewById(R.id.open);
close = (Button) this.findViewById(R.id.close);
openFlicker = (Button) findViewById(R.id.openFlicker);
closeFlicker = (Button) findViewById(R.id.closeFlicker);
open.setOnClickListener(openOnClickListener);
close.setOnClickListener(closeOnClickListener);
openFlicker.setOnClickListener(openFlickerOnClickListener);
closeFlicker.setOnClickListener(closeFlickerOnClickListener);
}
/**
* 打开手电筒
*/
private OnClickListener openOnClickListener = new OnClickListener() {
@Override
public void onClick(View v) {
open();
}
};
/**
* 关闭手电筒
*/
private OnClickListener closeOnClickListener = new OnClickListener() {
@Override
public void onClick(View v) {
close();
}
};
/**
* 开启闪烁
*/
private OnClickListener openFlickerOnClickListener = new OnClickListener() {
@Override
public void onClick(View v) {
isShanshuo = true;
openFlicker.setEnabled(false);
new Thread(new Runnable() {
@Override
public void run() {
while (isShanshuo) {
open();
try {
Thread.sleep(300);
} catch (InterruptedException e) {
e.printStackTrace();
}
close();
try {
Thread.sleep(300);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}).start();
}
};
/**
* 关闭闪烁
*/
private OnClickListener closeFlickerOnClickListener = new OnClickListener() {
@Override
public void onClick(View v) {
isShanshuo = false;
openFlicker.setEnabled(true);
}
};
/**
* 打开闪光灯
*
* @return
*/
private void open() {
try {
camera = Camera.open();
camera.startPreview();
Parameters parameters = camera.getParameters();
parameters.setFlashMode(Parameters.FLASH_MODE_TORCH);
camera.setParameters(parameters);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 关闭闪光灯
*
* @return
*/
private void close() {
try {
Parameters parameters = camera.getParameters();
parameters.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);
camera.setParameters(parameters);
camera.release();
camera = null;
} catch (Exception e) {
e.printStackTrace();
}
}
}