Android内存使用情况的应用实例
实现效果图：
创建项目
Android清单文件
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.itheima28.memorydemo"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.itheima28.memorydemo.MainActivity"
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>
</manifest>
布局文件
<RelativeLayout 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.itheima28.memorydemo.MainActivity$PlaceholderFragment" >
<TextView
android:id="@+id/tv_memory_info"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"/>
</RelativeLayout>
查询内存的代码
package com.itheima28.memorydemo;
import Java.io.File;
import android.os.Bundle;
import android.os.Environment;
import android.os.StatFs;
import android.support.v7.app.ActionBarActivity;
import android.text.format.Formatter;
import android.widget.TextView;
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView tvMemoryInfo = (TextView) findViewById(R.id.tv_memory_info);
//获得sd卡的内存状态
File sdcardFileDir = Environment.getExternalStorageDirectory();
String sdcardMemory = getMemoryInfo(sdcardFileDir);
//获得手机内部存储控件的状态
File dataFileDir = Environment.getDataDirectory();
String dataMemory = getMemoryInfo(dataFileDir);
tvMemoryInfo.setText("SD卡: " + sdcardMemory + "\n手机内部: " + dataMemory);
}
@SuppressWarnings("deprecation")
private String getMemoryInfo(File path) {
//获得一个磁盘状态对象
StatFs stat = new StatFs(path.getPath());
//获得一个扇区的大小
long blockSize = stat.getBlockSize();
//获得扇区的总数
long totalBlocks = stat.getBlockCount();
//获得可用的扇区数量
long availableBlocks = stat.getAvailableBlocks();
//总空间
String totalMemory = Formatter.formatFileSize(this, totalBlocks * blockSize);
//可用空间
String availableMemory = Formatter.formatFileSize(this, availableBlocks * blockSize);
return "总空间：" + totalMemory + "\n可用空间：" + availableMemory;
}
}
感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！
您可能感兴趣的文章:Android获取SD卡路径及SDCard内存的方法android 退出程序解决内存释放的问题Android App调试内存泄露之Cursor篇Android加载大分辨率图片到手机内存中的实例方法解析Android开发优化之:对Bitmap的内存优化详解Android 中对于图片的内存优化方法Android手机内存中文件的读写方法小结android内存优化之图片优化
