即使APK沒有安裝在手機上,我們也可以獲取它的某些資訊,比如包名,版本,應用圖示,activities等等,代碼如下:

MainActivity:

 
package com.home.getapkinfo;

import java.io.File;
import java.util.ArrayList;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener {
private Button getPackageBtn;
private Button getVersionNameBtn;
private Button getVersionCodeBtn;
private Button getActivitiesBtn;
private Button getIcon;
private ImageView iconImage;
private EditText apkName;
private TextView packageNameText;
private TextView versionNameText;
private TextView versionCodeText;
private PackageManager pm;
private String apkPath;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
pm = getPackageManager();
initWidget();
}

@Override
public void onClick(View v) {
// 验证应用名
String name = apkName.getText().toString();
if ("".equals(name) || null == name) {
Toast.makeText(this, "应用名称不能为空", Toast.LENGTH_SHORT).show();
return;
}
File file = new File(Environment.getExternalStorageDirectory(), name
+ ".apk");
if (!file.exists()) {
Toast.makeText(this, "该应用不存在", Toast.LENGTH_SHORT).show();
return;
}
apkPath = file.getAbsolutePath();

if (v == getPackageBtn) {
packageNameText.setText("package name:" + getPackageName(apkPath));
} else if (v == getVersionNameBtn) {
versionNameText.setText("version name:" + getVersionName(apkPath));
} else if (v == getVersionCodeBtn) {
versionCodeText.setText("version code:" + getVersionCode(apkPath)
+ "");
} else if (v == getActivitiesBtn) {
ArrayList<String> list = getActivitiesName(apkPath);
Intent intent = new Intent(this, ShowActivity.class);
intent.putStringArrayListExtra("activityList", list);
startActivity(intent);
} else if (v == getIcon) {
Drawable drawable = getApkIcon(apkPath);
if (drawable != null) {
iconImage.setBackground(drawable);
}
}
}

private void initWidget() {
getPackageBtn = (Button) findViewById(R.id.main_btn_getpackagename);
getVersionCodeBtn = (Button) findViewById(R.id.main_btn_getversioncode);
getVersionNameBtn = (Button) findViewById(R.id.main_btn_getversionname);
apkName = (EditText) findViewById(R.id.main_et_apkName);
getPackageBtn.setOnClickListener(this);
getVersionCodeBtn.setOnClickListener(this);
getVersionNameBtn.setOnClickListener(this);
packageNameText = (TextView) findViewById(R.id.main_tv_packagename);
versionCodeText = (TextView) findViewById(R.id.main_tv_versioncode);
versionNameText = (TextView) findViewById(R.id.main_tv_versionname);
getActivitiesBtn = (Button) findViewById(R.id.main_btn_getactivities);
getActivitiesBtn.setOnClickListener(this);
iconImage = (ImageView) findViewById(R.id.main_iv);
getIcon = (Button) findViewById(R.id.main_btn_geticon);
getIcon.setOnClickListener(this);
}

/**
* 获取APK的包名
*
* @param apkPath
* @return
*/
private String getPackageName(String apkPath) {
PackageInfo pi = pm.getPackageArchiveInfo(apkPath,
PackageManager.GET_ACTIVITIES);
String packageName = null;
if (pi != null) {
packageName = pi.packageName;
}
return packageName;
}

/**
* 获取APK版本名称(versionName)
*
* @param apkPath
* @return
*/
private String getVersionName(String apkPath) {
PackageInfo pi = pm.getPackageArchiveInfo(apkPath,
PackageManager.GET_ACTIVITIES);
String versionName = null;
if (pi != null) {
versionName = pi.versionName;
}
return versionName;
}

/**
* 获取APK版本号(versionCode)
*
* @param apkPath
* @return
*/
private int getVersionCode(String apkPath) {
PackageInfo pi = pm.getPackageArchiveInfo(apkPath,
PackageManager.GET_ACTIVITIES);
int versionCode = 1;
if (pi != null) {
versionCode = pi.versionCode;
}
return versionCode;
}

/**
* 获取APK的所有activity的name
*
* @param apkPath
* @return
*/
private ArrayList<String> getActivitiesName(String apkPath) {
PackageInfo pi = pm.getPackageArchiveInfo(apkPath,
PackageManager.GET_ACTIVITIES);
ArrayList<String> list = null;
if (pi != null) {
list = new ArrayList<String>();
ActivityInfo[] ais = pi.activities;
if (ais != null) {
for (ActivityInfo ai : ais) {
String name = ai.name;
if (name != null && !"".equals(name)) {
list.add(name);
}
}
}
}
return list;
}

/**
* 获取应用程序图片Drawable
*
* @param apkPath
* @return
*/
private Drawable getApkIcon(String apkPath) {
PackageInfo pi = pm.getPackageArchiveInfo(apkPath,
PackageManager.GET_ACTIVITIES);
if (pi != null) {
ApplicationInfo appInfo = pi.applicationInfo;
appInfo.sourceDir = apkPath;
appInfo.publicSourceDir = apkPath;
try {
return appInfo.loadIcon(pm);
} catch (OutOfMemoryError e) {
e.printStackTrace();
}
}
return null;
}

}
ShowActivity:

 
package com.home.getapkinfo;

import java.util.ArrayList;

import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;

public class ShowActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.show_activity);
ListView listView = (ListView) findViewById(R.id.show_activity_lv);
ArrayList<String> list = getIntent().getStringArrayListExtra(
"activityList");
if (list != null) {
listView.setAdapter(new MyAdapter(this, list));
}
}
}
MyAdapter:

 
package com.home.getapkinfo;

import java.util.ArrayList;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

public class MyAdapter extends BaseAdapter {
private ArrayList<String> list;
private Context context;

public MyAdapter(Context context, ArrayList<String> list) {
this.context = context;
this.list = list;
}

@Override
public int getCount() {
return list.size();
}

@Override
public Object getItem(int arg0) {
return list.get(arg0);
}

@Override
public long getItemId(int arg0) {
return arg0;
}

@Override
public View getView(int positon, View arg1, ViewGroup arg2) {
TextView tv = new TextView(context);
tv.setText(list.get(positon));
tv.setTextSize(18);
return tv;
}

}
main.xml:

 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<EditText
android:id="@+id/main_et_apkName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="输入应用名称即可,默认路径是SD卡根目录,默认后缀是.apk" />

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >

<Button
android:id="@+id/main_btn_getpackagename"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="包名" />

<Button
android:id="@+id/main_btn_getversionname"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="版本名" />

<Button
android:id="@+id/main_btn_getversioncode"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="版本号" />
</LinearLayout>

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >

<Button
android:id="@+id/main_btn_geticon"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="APK图标" />

<Button
android:id="@+id/main_btn_getactivities"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="activity name" />
</LinearLayout>

<TextView
android:id="@+id/main_tv_packagename"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="这里显示版本名"
android:textSize="18sp" />

<TextView
android:id="@+id/main_tv_versionname"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="这里显示包名"
android:textSize="18sp" />

<TextView
android:id="@+id/main_tv_versioncode"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="这里显示版本号"
android:textSize="18sp" />

<ImageView
android:id="@+id/main_iv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"/>

</LinearLayout>
show_activity.xml:

 
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<ListView
android:id="@+id/show_activity_lv"
android:layout_width="match_parent"
android:layout_height="wrap_content" />

</LinearLayout>
权限:

 
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
来自:http://blog.csdn.net/u010142437/article/details/19568483

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