Environment和StatFs查看存储卡剩余容量
public class MobileMemoryActivity extends Activity {
private Button mButton;
private TextView mTextView;
private ProgressBar mProgressBar;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mobile_memory);
mButton = (Button) findViewById(R.id.mobile_memory_Button);
mTextView = (TextView) findViewById(R.id.mobile_memory_TextView);
mProgressBar = (ProgressBar) findViewById(R.id.mobile_memory_ProgressBar);
mButton.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v) {
showSize();
}
});
}
private void showSize(){
mTextView.setText("");
mProgressBar.setProgress(0);
if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
File path = Environment.getExternalStorageDirectory();
StatFs statFs = new StatFs(path.getPath());
//取得block的size
long blockSize = statFs.getBlockSize();
//取得总容量
long tatalBlock = statFs.getBlockCount();
//取得可用容量
long availableBlock = statFs.getAvailableBlocks();
String[] total = fileSize(blockSize*tatalBlock);
String[] available = fileSize(blockSize*availableBlock);
//计算可用容量所占比例，在进度条上的显示值
int ps = Integer.parseInt(available[0])*mProgressBar.getMax()/Integer.parseInt(total[0]);
mProgressBar.setProgress(ps);
String text = "总共："+total[0]+" "+ total[1]+"\n"
+"可用："+available[0]+""+available[1];
mTextView.setText(text);
}
}
private String[] fileSize(long size){
String str = "";
if(size>=1024){
str="kb";
size/=1024;
if(size>=1024){
str="mb";
size/=1024;
}
}
DecimalFormat df = new DecimalFormat();
df.setGroupingSize(3);
String[] ss = new String[2];
ss[0] = df.format(size);
ss[1] = str;
return ss;
}
}
