android_69_camera_videoCapture

最新推荐文章于 2023-11-13 09:09:18 发布

原创最新推荐文章于 2023-11-13 09:09:18 发布 · 1.3k 阅读

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文章标签：

#android #Camera #VideoCapture

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本文介绍了一个简单的Android应用，该应用包含两个按钮：一个用于启动系统相机进行拍照，另一个用于启动系统摄像功能录制视频。拍照和录像文件均保存在设备的外部存储中，并使用当前日期时间来命名。

效果:

清单:

布局:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.sg31.camera.MainActivity"
    >

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="启动拍照程序" 
        android:onClick="cameraBtnClicked"
        />
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="启动摄像程序" 
        android:onClick="recordBtnClicked"
        />

</LinearLayout>

代码:

package com.sg31.camera;

import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;

import android.support.v7.app.ActionBarActivity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends ActionBarActivity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// Handle action bar item clicks here. The action bar will
		// automatically handle clicks on the Home/Up button, so long
		// as you specify a parent activity in AndroidManifest.xml.
		int id = item.getItemId();
		if (id == R.id.action_settings) {
			return true;
		}
		return super.onOptionsItemSelected(item);
	}

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		super.onActivityResult(requestCode, resultCode, data);
		if (requestCode == 1000) {
			Toast.makeText(this, "拍照成功", 0).show();
		} else if (requestCode == 2000) {
			Toast.makeText(this, "摄像成功", 0).show();
		}
	}

	public void cameraBtnClicked(View v) {
		// 启动系统提供的拍照activity
		Intent intent = new Intent();
		String fileName = tool_currentDateTime() + ".jpg";
		
		intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);
		intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(
				Environment.getExternalStorageDirectory(), fileName)));
		startActivityForResult(intent, 1000);
	}

	public void recordBtnClicked(View v) {
		// 启动系统提供的摄像activity
		Intent intent = new Intent();
		String fileName = tool_currentDateTime() + ".3gp";
		
		intent.setAction(MediaStore.ACTION_VIDEO_CAPTURE);
		intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(
				Environment.getExternalStorageDirectory(), fileName)));
		intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);
		startActivityForResult(intent, 2000);
	}

	
	public String tool_currentDateTime() {
		  Date nowTime = new Date(System.currentTimeMillis());
		  SimpleDateFormat sdFormatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		  String retStrFormatNowDate = sdFormatter.format(nowTime);

		  return retStrFormatNowDate;
		}
}