手机各种文件存储路径测试

通过下面这个例子我们可以了解存储卡,缓存等文件路径
1. DisplayFiles.java文件

package cn.com;

import java.io.File;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class DisplayFiles<bRootDirectory> extends Activity {
	private Button bPhoneDirectory;
	private Button bDataDirectory;
	private Button bDownloadCacheDirectory;
	private Button bExternalStorageDirectory;
	private Button bRootDirectory;

	private File fPhoneDirectory;
	private File fDataDirectory;
	private File fDownloadCacheDirectory;
	private File fExternalStorageDirectory;
	private File fRootDirectory;

	private String name;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		bPhoneDirectory = (Button) findViewById(R.id.bPhoneDirectory);
		bRootDirectory = (Button) findViewById(R.id.bDataDirectory);
		bDownloadCacheDirectory = (Button) findViewById(R.id.bDownloadCacheDirectory);
		bExternalStorageDirectory = (Button) findViewById(R.id.bExternalStorageDirectory);
		bRootDirectory = (Button) findViewById(R.id.bRootDirectory);
		
		bDataDirectory = (Button) findViewById(R.id.bDataDirectory);

		fPhoneDirectory = this.getFilesDir();
		fDataDirectory = Environment.getDataDirectory();
		fDownloadCacheDirectory = Environment.getDownloadCacheDirectory();
		fExternalStorageDirectory = Environment.getExternalStorageDirectory();
		fRootDirectory = Environment.getRootDirectory();

		/*
		 * 没有存储卡的时候按键无效
		 */
		if (Environment.getExternalStorageState().equals(
				Environment.MEDIA_REMOVED)) {
			bExternalStorageDirectory.setEnabled(false);
		}

		/*
		 * 访问应用程序手机内存
		 */
		bPhoneDirectory.setOnClickListener(new Button.OnClickListener() {
			public void onClick(View v) {
				String path = fPhoneDirectory.getPath();

				name = path + "\n";
				ListFiles(path, "");

				Toast.makeText(DisplayFiles.this, name, Toast.LENGTH_LONG)
						.show();
			}
		});

		/*
		 * 访问存储卡
		 */
		bExternalStorageDirectory
				.setOnClickListener(new Button.OnClickListener() {
					public void onClick(View v) {
						String path = fExternalStorageDirectory.getPath();
						name = path + "\n";
						ListFiles(path, "");

						Toast.makeText(DisplayFiles.this, name,
								Toast.LENGTH_LONG).show();
					}
				});

		bDownloadCacheDirectory
				.setOnClickListener(new Button.OnClickListener() {
					public void onClick(View v) {
						String path = fDownloadCacheDirectory.getAbsolutePath();
						Toast.makeText(DisplayFiles.this, path,
								Toast.LENGTH_LONG).show();
					}
				});

		bRootDirectory.setOnClickListener(new Button.OnClickListener() {
			public void onClick(View v) {
				String path = fRootDirectory.getAbsolutePath();
				Toast.makeText(DisplayFiles.this, path, Toast.LENGTH_LONG)
						.show();
			}
		});

		bDataDirectory.setOnClickListener(new Button.OnClickListener() {
			public void onClick(View v) {
				String path = fDataDirectory.getAbsolutePath();
				Toast.makeText(DisplayFiles.this, path, Toast.LENGTH_LONG)
						.show();
			}
		});

	}

	private boolean ListFiles(String path, String arr) {
		File file = new File(path);
		arr = arr + "\t"; // arr为层次变量，使目录有层次感

		for (File f : file.listFiles()) {
			path = f.getAbsolutePath();
			name = name + arr + f.getName() + "\n";

			if (f.isDirectory() == true) {
				ListFiles(path, arr); // 当f为文件夹的时候，进入文件夹中
			}
		}

		return true;
	}
}

2.main.xml文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical" android:layout_width="fill_parent"
	android:layout_height="fill_parent">
	<TextView android:layout_width="fill_parent"
		android:layout_height="wrap_content" android:text="@string/hello" />

	<Button android:id="@+id/bPhoneDirectory" android:layout_width="fill_parent"
		android:layout_height="wrap_content" android:text="@string/bPhoneDirectory" />
	<Button android:id="@+id/bExternalStorageDirectory"
		android:layout_width="fill_parent" android:layout_height="wrap_content"
		android:text="@string/bExternalStorageDirectory" />

	<Button android:id="@+id/bDataDirectory" android:layout_width="fill_parent"
		android:layout_height="wrap_content" android:text="@string/bDataDirectory" />
	<Button android:id="@+id/bDownloadCacheDirectory"
		android:layout_width="fill_parent" android:layout_height="wrap_content"
		android:text="@string/bDownloadCacheDirectory" />
	<Button android:id="@+id/bRootDirectory" android:layout_width="fill_parent"
		android:layout_height="wrap_content" android:text="@string/bRootDirectory" />
</LinearLayout>