android 获得SDCard信息
android 获得SDCard信息
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >
<!-- 显示block的数量的标签控件 -->
<TextView
android:id="@+id/tv_TotalBlocks"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<!-- 显示block的大小的标签控件 -->
<TextView
android:id="@+id/tv_BlocSize"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<!-- 显示可用block的标签控件 -->
<TextView
android:id="@+id/tv_AvailaBlock"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<!-- 显示空block的标签控件 -->
<TextView
android:id="@+id/tv_FreeBlock"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<!-- 显示SDCard的总大小的标签控件 -->
<TextView
android:id="@+id/tv_SDTotalSize"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<!-- 显示SDCard的剩余大小的标签控件 -->
<TextView
android:id="@+id/tv_SDFreeSize"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
package com.example.yanlei.yl2;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.TextView;
import java.io.File;
public class MainActivity extends AppCompatActivity {
private TextView mTvTotalBlocks; //SDCard上BLOCK总数
private TextView mTvBlocSize; //SDCard上每个block的SIZE
private TextView mTvAvailaBlock; //可供程序使用的Block的数量
private TextView mTvFreeBlock; //剩下的所有Block的数量(包括预留的一般程序无法使用的块)
private TextView mTvSDTotalSize; //SDCard 总容量大小MB
private TextView mTvSDFreeSize; //SDCard 剩余大小MB
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 得到布局中的控件
findView();
// 绑定控件事件
SDCardSizeTest();
}
private void findView() {
// 绑定控件
mTvTotalBlocks = (TextView)findViewById(R.id.tv_TotalBlocks);
mTvBlocSize = (TextView)findViewById(R.id.tv_BlocSize);
mTvAvailaBlock = (TextView)findViewById(R.id.tv_AvailaBlock);
mTvFreeBlock = (TextView)findViewById(R.id.tv_FreeBlock);
mTvSDTotalSize = (TextView)findViewById(R.id.tv_SDTotalSize);
mTvSDFreeSize = (TextView)findViewById(R.id.tv_SDFreeSize);
}
public void SDCardSizeTest() {
// 取得SDCard当前的状态
String sDcString = android.os.Environment.getExternalStorageState();
//如果当前系统有sdcard存在
if (sDcString.equals(android.os.Environment.MEDIA_MOUNTED)) {
// 取得sdcard文件路径
File pathFile = android.os.Environment
.getExternalStorageDirectory();
//得到sdcard的状态
android.os.StatFs statfs = new android.os.StatFs(pathFile.getPath());
// 获取SDCard上BLOCK总数
long nTotalBlocks = statfs.getBlockCount();
mTvTotalBlocks.setText("SDCard上BLOCK总数: "+nTotalBlocks);
// 获取SDCard上每个block的SIZE
long nBlocSize = statfs.getBlockSize();
mTvBlocSize.setText("SDCard上每个bloc的SIZE:"+nBlocSize);
// 获取可供程序使用的Block的数量
long nAvailaBlock = statfs.getAvailableBlocks();
mTvAvailaBlock.setText("可供程序使用的Block的数量 : " + nAvailaBlock);
// 获取剩下的所有Block的数量(包括预留的一般程序无法使用的块)
long nFreeBlock = statfs.getFreeBlocks();
mTvFreeBlock.setText("剩下的所有Block的数量: " + nFreeBlock);
// 计算SDCard 总容量大小MB
long nSDTotalSize = nTotalBlocks * nBlocSize / 1024 / 1024;
mTvSDTotalSize.setText("SDCard 总容量大小MB: " + nSDTotalSize +"MB");
// 计算 SDCard 剩余大小MB
long nSDFreeSize = nAvailaBlock * nBlocSize / 1024 / 1024;
mTvSDFreeSize.setText(" SDCard 剩余大小MB: " + nSDFreeSize +"MB");
}
}
}
import android.os.Bundle;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
import java.io.BufferedReader;
import java.io.File;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private TextView myTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myTextView= (TextView)findViewById(R.id.myTextView);
StringBuilder log = new StringBuilder();
String inPath = getInnerSDCardPath();
String str="内置SD卡路径：" + inPath + "\r\n";
log.append("内置SD卡路径：" + inPath + "\r\n");
List<String> extPaths = getExtSDCardPath();
for (String path : extPaths) {
str=str+"外置SD卡路径：" + path + "\r\n";
log.append("外置SD卡路径：" + path + "\r\n");
}
myTextView.setText(str);
System.out.println(log.toString());
}
/**
* 获取内置SD卡路径
* @return
*/
public String getInnerSDCardPath() {
return Environment.getExternalStorageDirectory().getPath();
}
/**
* 获取外置SD卡路径
* @return 应该就一条记录或空
*/
public List<String> getExtSDCardPath()
{
List<String> lResult = new ArrayList<String>();
try {
Runtime rt = Runtime.getRuntime();
Process proc = rt.exec("mount");
InputStream is = proc.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line;
while ((line = br.readLine()) != null) {
if (line.contains("extSdCard"))
{
String [] arr = line.split(" ");
String path = arr[1];
File file = new File(path);
if (file.isDirectory())
{
lResult.add(path);
}
}
}
isr.close();
} catch (Exception e) {
}
return lResult;
}
