安裝apk

/**
     * 安裝apk
     * @param v
     */
    public void install(View v) {
	String path=et_apkpath.getText().toString();
	Intent intent=new Intent();
	intent.setAction("android.intent.action.VIEW");
	intent.addCategory("android.intent.category.DEFAULT");
	intent.setDataAndType(Uri.fromFile(new File(path)), "application/vnd.android.package-archive");
	startActivity(intent);
    }